Joel Sherman doesn't like MLB roster callups. I might have a solution to his concerns.

Joel Sherman really hates MLB's September roster expansion rules:

"In a sport with plenty of dumb rules and traditions, this one seems created by Larry as told to Moe and implemented by Curly."

I personally never did mind the September callups. After playing over 130 games, I'm sure major leaguers would welcome a breather every now and then. And for fans of teams not in the playoff hunt, it's a chance to see the future players and revive the optimism of Spring Training again (and sell a handful of tickets that the team otherwise might not have sold.) Sherman does raise some good points about fairness though in terms of having a seemingly unlimited row of pinch hitters and pitchers in the bullpen.

Perhaps a solution would be to allow the rosters expand to 40 players but require each time declare an active roster of 30 players for each series, allowing for replacements only if players go on the disabled list (to avoid gaming the system with phantom injuries). A player not available for one series could replace someone else when the opponent changes but not before, regardless of whether the teams are playing 2, 3, or 4 games or just making up a single rainout from earlier in the year. That way each team knows who is and is not available for the other team during the series. Thoughts?