Professional athletes are taxed depending on which state each game is played in; ie what percentage of their income was generated by each game. They pay A LOT of states every year. So, with the high income players, this will have minimal impact on CA tax receipts. The support staff, on the other hand (coaches, trainers, etc) almost always reside where the team calls home and pays taxes accordingly.
Yeah??? Well, they play half of their games at HOME, so it is a BIG deal tax-wise. Next week Phil Mickelson will be making an announcement as to his future due to both the recent huge increase in state income taxes here in CA and the recent new Fed tax increases on upper income folks. Look for him to be moving out of CA and possibly retiring from Pro Golf. He just backed out of investing in the San Diego Padres due to the recent tax changes. Any high income person would have to be nuts to move into CA on a full time basis.