Bo's football career was ended and he received an artificial hip and continued to play baseball, but that career was ended a season and a half later (He sat out a year and played a year and then retired in the middle of a season.)

Bo was considered by some to be the best multi-sport athlete since Jim Thorpe. I know that Vic Janowicz, Heisman winner from Ohio State (Elyria, Ohio) played in the NFL and for the Pittsburgh Pirates. Some others I can remember off the top of my head were Neon Deon, Dave DeBusschere (White Sox-Knicks), Gene Conley (Celtics-Red Sox?). Jordan tried baseball but didn't make it to the bigs.

Any others at the major league level?

FWIW, my friend in high school suffered a spiral fracture of his tibia from a horse collar tackle...


Forks, i think Roger Staubach played baseball as well, but i'm not sure

Brian Jordan - MLB and NFL

Danny Ainge - NBA and MLB

Not only do I not understand the biophysics of how a horse collar, as described by NFL & NAFL, hurt his hip, but I also don't get how if it did, it could be any worse than a clothesline, half Nelson, or any other hold directly on the neck.

Would you count Jim Conacher?

Robert

collared
 

I have seen many a horse collar tackles over several decades of officiating, and it is apparent the intent of the rule is beyond reproach.

What is interesting is to recall how many different types of "collar" tackles there are and which ones require a flag?

It is not always easy to discern.