On June 14, 1949, Philadelphia Phillies first baseman Eddie Waitkus was returning to his hotel room at Edgewater Beach Hotel on Chicago's North Shore when he received an urgent message at the hotel desk, apparently sent to him by a woman identifying herself only as Ruth Ann Burns. Though Waitkus failed to recognize the name, the message itself was brief stating only that "It's extremely important that I see you as soon as possible. We're not acquainted, but I have something of importance to speak to you about I think it would be to your advantage to let me explain it to you. I realize this is a little out of the ordinary, but as I said, it's rather important. Please, come soon. I won't take up much of your time, I promise."
Despite having just finished a game between the Phillies and his old team, the Chicago Cubs, Waitkus was curious enough to telephone the hotel room mentioned in the note. While the woman answering the phone answered refused to say why she wanted to see him, she still insisted that he come in person. Arriving at the room, he found that the only person staying there was 19-year-old Ruth Ann Steinhagen, someone he had never met before. After entering the room, he sat down as asked her what she wanted at which point Steinhagen told him that she had a surprise for him. She then pulled a .22 caliber rifle out of a closet and pointed it at his chest. 
According to testimony Steinhagen later provided police, Waitkus jumped to his feet at that point, obviously terrified. She then told him, "For two years you've bothered me, now you're going to die." Though Waitkus cooperated when she told him to stand by the window, she then shot him at close range. The bullet, which passed very close to Waitkus' heart, failed to kill him instantly but, as he lay on the floor, she then proceeded to hold his hand. Phoning the hotel detective, she stated "I just shot a man. There's a long st0ry but I'm not going to talk about it." The detective, Edward Purdy, immediately rushed to investigate and found her sitting on a bench near the elevators. He also found Waitkus laying on the floor in her hotel room, the gun on the floor next to him, and immediately called for an ambulance as well as the police.
Phillies pitcher Russ Meyer, who happened to be Waitkus' roommate while they were staying at the hotel, later told reporters that he had been immediately called by the Phillies' traveling secretary and told about his badly injured friend. "I remember them hauling Eddie out to the ambulance," he said in a media interview. "The only thing he kept saying was, Why? Why? Why?" Waitkus was taken to Illinois Masonic Hospital where doctors operated to save his life and, despite nearly dying on the operating table several times, managed to remove the bullet successfully.
As for Ruth Ann Steinhagen, she was transferred to the women's lockup at the downtown police headquarters and held without charge while police and reporters tried to make sense of her actions. As part of their investigation, police took her back to the 12th floor hotel room where she had shot Waitkus and had her act out the entire shooting. She told them that she had initially planned to stab her intended victim and had placed a paring knife in her skirt pocket before letting him into her room. When he walked past her and sat down instead, she decided to use the rifle she had purchased earlier instead. She also said that, after shooting her victim, Waitkus appeared to be smiling as he lay on the floor and she told him, "You like that, don't you?" Though she reloaded the rifle and planned to shoot herself, she apparently changed her mind and called the hotel detective instead.
So, who was Ruth Ann Steinhagen and why did she shoot a man she had never met? According to most newspaper accounts, Steinhagen had a fairly unexceptional childhood growing up in Chicago and had lived with her parents until completing business college. Aside from being a "little more nervous than most girls" according to her mother, she showed no signs of mental health issues until she graduated from school and got a job as a clerk at a Chicago insurance company. It was also around this time that she first became obsessed with Eddie Waitkus, apparently after seeing him play at her first baseball game in 1946.
Saying of him that "he reminds me of everybody, especially my father," she soon began collecting every newspaper clipping she could find about his sports career. Eventually having hundreds of pictures of Waitkus in her collection, she alarmed her parents by spreading these pictures out on the floor in her bedroom or on the kitchen table where she stared at them for hours. Having learned of his Lithuanian background, she also began teaching herself words in that language as well as steadily eating baked beans because he was originally from Boston. Many details about the full extent of this obsession would not come out until years later.
When her parents attempted to intervene, including having her seen by two different psychiatrists, Steinhagen retaliated by moving out of their apartment into a nearby rooming house where she could be alone with her pictures. She also continued going to baseball games where she could see Waitkus play. As her mother would later relate, Steinhagen had watched him walk by near where she was sitting and "almost fainting," But her obsession with Eddie Waitkus hardly ended there. In her confession to police, Steinhagen admitted that she began planning to kill Waitkus almost immediately after he was traded to the Philadelphia Phillies in 1948.
Though she told her mother and friends about her plan to shoot Waitkus with a gun she planned to buy, they were naturally alarmed but took no action as they refused to believe that the gentle girl would be capable of carrying out this threat. It also helped that Waitkus was no longer in Chicago and everyone assumed that her obsession would subside in time since she could no longer see him play on a regular basis. Instead however, this forced absence apparently made her obsession even stronger. The shooting would take place not long afterward.
During Steinhagen's trial, newspapers were filled with stories about "Baseball Annie" (their nickname for her) along with staged photographs of her writing at her prison desk with a framed photograph of Waitkus propped nearby. As you might expect, newspapers also carried numerous sympathetic stories about Eddie Waitkus' long recovery and eventual return to baseball. Testimony heard at the trial included a court-ordered report prepared by the chief of the Cook County Behavioral Unit. Along with concluding that Steinhagen was "deranged" at the time of the shooting, the report also included numerous memorable quotes from what she told her doctors when interviewed. At one point, she admitted, "As time went on, I just became nuttier and nuttier about the guy, and I knew I would never get to known him in a normal way...and if I can't have him, nobody else can. And then I decided to kill him."
To nobody's surprise, Steinhagen was eventually declared not guilty by reason of insanity and sentenced to a psychiatric hospital. After three years however, she was declared sane enough to be released into the community. Though Waitkus and his family vehemently opposed her release, he still declined to press charges against Steinhagen and she was never retried for her crime. Details of her later life are surprisingly sketchy except that she lived quietly in Chicago until eventually dying in 2012 at age 83. It likely says much about how obscure she had become by then that news of her death only came out months later. Not even the morgue attendants recognized her name.
As for Eddie Waitkus, he eventually returned to play during the 1950 season and helped the Phillies win the National League Pennant that year. He also named Best Comeback Player of the Year by the Associated Press. But friends insisted that he was never the player he once was and his career in baseball only lasted five more years. According to his son, Eddie Waitkus, Junior in a 1988 news story, there was a bright side to the shooting, however. "While recovering from the shooting, my dad met my mother. Had it not been for this horrible event in his life, my sister and I would probably not be here." But the trauma also had a significant impact on Waitkus' personality and he acquired a new paranoia about meeting new people . He would also rarely discuss the shooting and how close he came to death except with family members.
In 1952, Bernard Malamud published his now-classic book, "The Natural" which was largely based on the Steinhagen case. The book was later made into a 1984 film starring Robert Redford as "Roy Hobbs" who is shot by a deranged fan played by Barbara Kersey and, naturally enough, this renewed interest in the long-ago case though (mercifully, Waitkus was already dead by this point). If the still-living Steinhagen had any comments to make about the film, they do not appear to be on record.
While some newspapers in 1949 carried editorials warning about the dangers of "celebrity worship", there didn't appear to be any meaningful change in the security surrounding celebrities as they interacted with fans. It would take many more years and many more cases involving violent fans before security details became common for celebrities whenever they were out in public. Still, for better or worse, that 1949 shooting meant that the age of the celebrity stalker had arrived...