That's exactly why I'm saying, even back in the days Brian Jordan had to quit the NFL to sign a major deal.With the way contracts are set up these days? No.
Only two people, as far as we know, were even allowed that and one is a bigger than life character and the other is seen as the greatest athlete ever and he got injured in one sport that damaged his career in both.
So it's not really about if people have the capability or not, cause as we have seen if you are drafted close to #1 in two sports obviously you could theoretically play both. But who is investing 46m's for you to be a part-time worker, when the barely want you to play pickup games or take the all-star game seriously