Matt Shaw has been placed on the injured list with back tightness, the Cubs announced Friday. Shaw, 24, first felt soreness Tuesday and it never eased. Manager Craig Counsell said Shaw woke up Friday feeling worse, so the team gave him time to heal. Shaw entered the season hitting .242 with three home runs in limited playing time.

Pedro Ramirez earned the call-up after a strong Triple-A start, where he was hitting .312 with nine home runs. Ramirez also impressed during spring training. Counsell noted the move serves as both a short-term roster fix and a development opportunity for the young infielder.

Ramirez gives the Cubs offensive depth while Shaw recovers, though Counsell acknowledged the stint will likely be brief. The back tightness caught the Cubs off guard, leaving them scrambling midweek for a replacement player.