Possibly. It really depends on the athlete and whether they are able to play a game without doing a good-luck ritual. If the athlete one day makes a mistake and forgets to do his or her good-luck ritual and is plagued with the thought that because he or she did not do it he or she will lose the game, then there is a possibility that some OCD is occurring. However, if the person is able to realize that even though he or she did not do the good-luck ritual, he or she could still win the game, then there would be no OCD.
Many athletes develop these “lucky” rituals because they pair certain experiences or events with winning a game. So, if one morning they ate Sugarpoofs cereal and then went on to pitch a no-hitter, there is a chance they’ll try to eat Sugarpoofs before they pitch their next game. Now, do Sugarpoofs have anything to do with winning a game? Of course not, but some people think that if it worked once, why take a chance and not do it the next time? So, they keep on eating Sugarpoofs. But if one day they run out of Sugarpoofs, they have a choice, they can eat another cereal, or they can go to the store and buy Sugarpoofs. This would not be OCD, but a habit. However, if they get to the store and find no Sugarpoofs, and then they either call the coach and refuse to pitch or do pitch but think only about how bad everything is going to be because they did not get to eat their Sugarpoofs, then a diagnosis of OCD is possible. These negative thoughts would most likely interfere with their pitching and concentration, likely leading them to pitch a bad game and probably to be taken out of the game very early. Of course, a thorough evaluation with a mental health professional would be necessary to actually diagnose OCD.