Well you guys were a lot of help.
Shopping Around Harry Lumley, the incumbent RFer, provided three players the AI would give me - none of whom are useful for me despite being decent ballplayers.
Shopping Around Ty Cobb, only one player appears - the 6/10/7 rated pitcher who was the first overall draft pick in this past draft. He is going to be a stud, but I can't do that to the AI. So, for now, I'm going to continue using Cobb as my backup outfielder but setting his playing time to try and get him in at each position once a week or so.