Fantasy Baseball - Add a MLB Manager Roster spot like Team Def in Fan. Football
Subsequently you'd need a category called "Net Challenges" (Challenges Won- Challenges Lost)
No need to have the actual name of the manager, just the team. This would be like in Fantasy football where you have a Team DEF on your roster. Why not Baseball Managers for the stat category Net Challenges? some MLB Managers are better at winning challenges than others.
David R Goforth commented
A team offense and a team defense with double plays, outfield put outs, along with unearned runs would be nice