Mets Notes: Peterson, Infield, Lindor

David Peterson will make his season debut tomorrow, as he’s listed as the Mets’ probable starter for their series finale against the Dodgers. New York will need to reinstate the left-hander from the 60-day injured list. They already have an opening on the 40-man roster, so they’ll only need to make an active roster transaction.

Peterson slots back into the starting five after undergoing a labrum repair in his left hip in November. The rehab process went smoothly and the southpaw makes his return from the IL not long after he’s first eligible. Peterson has made six minor league rehab starts, the last two of which came with Triple-A Syracuse. He built to 89 pitches in his most recent appearance. He shouldn’t have much issue logging something close to a standard workload out of the gate.

The Oregon product has spent parts of the last four seasons in the New York rotation. He started 21 of 27 games last season, setting a personal high with 111 innings. Peterson’s 5.03 earned run average wasn’t especially impressive, but he punched out 26% of opposing hitters. While he’s never had pinpoint command, he managed a 3.83 ERA behind a near-28% strikeout rate two seasons ago.

It looks as if the Mets will plug Peterson into a six-man rotation. Rookie Christian Scott has pitched well through his first four appearances and should remain in the starting staff. Luis Severino, Sean Manaea and Jose Quintana are all locked into rotation spots, although Quintana hasn’t pitched all that well. Tylor Megill has been excellent in his pair of starts since coming back from a shoulder strain.

Peterson’s return should at least bump struggling Adrian Houser into a long relief role. The right-hander’s hold on a roster spot seems tenuous, as he has been rocked for a 7.34 ERA with more walks than strikeouts in his first 41 2/3 innings as a Met. Houser can’t be sent to the minor leagues without his consent, leaving the Mets to decide whether to move on entirely or hope to get him on track in the bullpen.

Reed Garrett and Josh Walker are the only members of the current MLB bullpen who have options. (Dedniel Nuñez was up for today’s doubleheader as the 27th man but will likely be returned to Syracuse tomorrow.) Garrett has been arguably their best reliever and certainly isn’t getting sent down. Walker has been on and off the active roster a few times already. He could be optioned, though doing so would leave Jake Diekman as the only left-hander in Carlos Mendoza’s ’pen.

That may not be the only roster decision facing the Mets in the next few days. New York has operated without a traditional backup middle infielder since they designated Joey Wendle for assignment two weeks ago. The Mets have carried both Brett Baty and Mark Vientos, dividing playing time for the youngsters at third base. With Pete Alonso and J.D. Martinez at first base and DH, respectively, there’s not much defensive value on Mendoza’s bench.

President of baseball operations David Stearns acknowledged this afternoon that arrangement isn’t a long-term solution (link via Will Sammon of the Athletic). That came before today’s doubleheader, in which Lindor injured his left index finger on a bunt attempt. The All-Star told Tim Healey of Newsday that x-rays came back negative (X link), but it stands to reason the Mets would prefer to have some kind of shortstop insurance for the coming days even if they expect Lindor to avoid the injured list.

Aside from McNeil and Lindor, prospect Luisangel Acuña is the only healthy middle infielder on the 40-man roster. The 22-year-old is hitting just .254/.301/.353 in Syracuse and seems to need more development time in Triple-A. It’s likelier the Mets would select the contract of a more experienced non-roster player if they decide to add to their bench. Jose Iglesias and the recently-acquired Pablo Reyes are possibilities.