With Anthony Rizzo firmly implanted at first base since 2012, the Cubs really haven’t had a need to go out and develop a replacement. But Rizzo will be 32 years old and beginning the back third of his career when his contract expires at the end of the 2021 season. Even if the Cubs end up signing him to an extension, they need to have some options waiting in the wings.
Most of the prospects they’ve used at first in the minors were catchers taking a day off from behind the plate or outfielders trying to get a few extra at-bats.