Yep!! You usually don't hear much about it cause baseball coaches will not let their players who play football join.

Is there fall baseball in high school? Or is that outside of school?

Bottom line..... No kid should be Mandated to play any off season sport if they are playing another sport... Its not fair to the ALL the kids that are playing their in season sport. (Again we are not talking about lifting and agility) With the new UIL rules with sport specific summer workouts.. Each sport gets 1 hour a day of sport specific all summer long.. That is 2 strait month of practice.. If a AD/Head football coach can not get his team ready... that's on him 

Is there fall baseball in high school?

Correct.. Riggs never played baseball.. In fact, if memory serves my right, didn't that PNG State winning team have their top 2 pitchers quit football their SR. year??