The plugging was aimed a great deal at track and field sprinters and weightmen.I do recall that when I went to SCC, which was a JuCo basketball powerhouse, they definitely had basketball players on baseball scholarships. But that was in the 70's, before the NCAA really started going nuts with all of the scholarship rules. It does seem plausible that at one time schools were able to fudge the system, but it also seems likely that if there was a hole it's since been plugged.