The 31-year-old Senga has been sidelined by a capsule strain in his pitching shoulder. But he has started long-tossing.
Former Athletics pitcher-turned-Toronto Blue Jays starter Chris Bassitt pitched eight innings of nearly flawless baseball before walking off the mound with a special piece of memorabilia.
Brett Baty will get work at second base at Triple-A Syracuse, but manager Carlos Mendoza said the Mets still view him as a third baseman.
Updates on Trea Turner, who may not go on a rehab assignment, and Brandon Marsh, who will begin baseball activities with Lehigh Valley Saturday.