Pablo Lopez To Miss Multiple Months With Teres Major Strain

June 5: The Twins formally placed Lopez on the injured list and recalled Festa today, per a club announcement.

June 4: The Twins announced that Pablo López suffered a Grade 2 strain of the teres major in his throwing shoulder. He’s expected to miss eight to 12 weeks. He’ll be shut down from throwing entirely for at least a month before he goes for reevaluation.

López left last night’s start against the A’s after five innings. He reported shoulder discomfort while throwing his warm-up pitches in advance of the sixth. The Twins immediately acknowledged that an injured list stint was inevitable. They were awaiting the results of today’s imaging before making that move. It’s unfortunately significant enough that it’ll cost him the majority of the remaining schedule.

This is the same injury and degree of strain which rotation mate Joe Ryan sustained last August. Ryan went down early in the month and missed the remainder of the season. It didn’t carry into the offseason, and he has returned as strong as ever this year. That’s a source of long-term optimism for López, but it doesn’t change the significant hit to the rotation over the next few months.

It’s the righty’s second, and far more notable, IL stint this year. López had a minimal absence in April due to a hamstring strain. The injuries have interrupted a characteristically strong performance. He sports a 2.82 earned run average across 60 2/3 frames. It would have been his first career sub-3.00 showing if he maintained it all year. He has fanned nearly a quarter of opponents while allowing two or fewer runs in nine of his 11 appearances.

Minnesota has one of the top rotations in the league. They’re fifth in MLB with a 3.43 ERA while ranking eighth with a 23.2% strikeout rate. López, Ryan, Bailey Ober and Chris Paddack have all performed well. The final spot has been the only weak point. Simeon Woods Richardson was optioned out after allowing more than five earned runs per nine. Zebby Matthews replaced him in the rotation last month. He made his fourth start of the season tonight and carries a 5.21 ERA over 19 innings. He’s missing plenty of bats, though, so he’s a more exciting fifth starter than Woods Richardson has been.

David Festa will get the first crack at plugging López’s rotation spot. He was scratched from a start at Triple-A St. Paul this evening, as first noted by Declan Goff of SKOR North. Festa traveled to Sacramento to meet the big league team. Dan Hayes of The Athletic writes that he will likely go in tomorrow’s series finale to give the rest of the starters an extra day of rest.

The 25-year-old Festa ranked as one of the sport’s better pitching prospects when he was promoted last summer. He allowed a 4.90 ERA over his first 14 MLB appearances. He made a trio of starts early in the season while López was sidelined by the hamstring. Festa managed an impressive 15:5 strikeout-to-walk ratio while allowing only three runs through 13 innings. He has pitched well through six Triple-A starts, turning in a 2.83 mark with a near-31% strikeout rate. Hayes notes that he was sidelined for much of May by biceps inflammation, but he has looked sharp in two appearances since returning. He fired five scoreless frames with five strikeouts in his most recent start.

Festa is a high-upside injury replacement. Woods Richardson remains on optional assignment as a depth arm. The rotation depth is a silver lining, but it’s fair to wonder how this impacts the team’s deadline approach. López won’t be back at least into August and could be shelved into September. The Twins are in the thick of a congested AL Wild Card race and six games behind the Tigers in the division.