The Chicago Cubs‘ Ian Happ has been trying to work his way back to the majors after starting this season in the minors. This is his first minor league stint since 2017 before he got his call to the majors. Last year he struggled with a .233/.353/.408 slash with a 36.1% K rate. He could draw walks (hence the good on-base percentage) but was not making enough contact.
Happ was not going to be able to play every day with the Chicago Cubs, but down in the minors, he has been. This is a significant factor as to why he was sent down.