Amanda Dufner is another one if you're a golf fan.
Not to go too far off topic, but if we are talking about crazy wives/girlfriends of professional athletes, then let me introduce probably the first star -
Miko Grimes is another wife/girlfriend who has caused lots of trouble for her athlete husband, Brent Grimes. Grimes is a CB in the NFL who was with the Dolphins, then was cut after his wife criticized the team and its QB, among many other tirades and an arrest at the stadium, and he is now with the Bucs.
According to a Sports Illustrated article -
"She would get him run out of town by going "as wild as possible on social media." Her version of what happened next: "[Brent] said, 'Go for it.' I got his full permission to be as disrespectful to the Dolphins as I wanted to be. And I threw in [Dolphins quarterback Ryan Tannehill] because I don't like him or his wife."
I believe she has threatened team beat writers, launched Twitter rants that order from unhinged to racist (usually anti-semitism is the theme) and repeatedly gone after the NFL in general. She is about 10 years older than Brent Grimes, has completely alienated his family I guess, and appears to have a hold on him and will do whatever she can to further her career even if it hurts his career.
But he lets it happen so that is definitely on him.