What can we expect from Mitch Keller in 2022?

It’s hard to know what to make of Mitch Keller.

The knee-jerk response might be: not much. The one-time top prospect came to the big leagues with a bushel full of hype; Baseball America ranked him as the club’s No. 1 prospect for three straight seasons – 2018 through 2020 – after slotting him in at No. 2 in 2017. The same publication tabbed Keller as the No. 12 prospect overall in 2018, up 10 spots from the previous season.

But heading into the Pittsburgh Pirates’ 2022 season, it’s hard to be all that enthused about Keller, at least based on his recent performances. Those close to Keller, though, indicated this week that the right-hander is working to modify his delivery, and those changes…