Though Herrera curried instant favor by homering twice in his first seven games as a 20-year-old callup last season, he was never part of the team's short-term plans. Instead, Herrera will start this year at Triple-A Las Vegas, a level he skipped entirely last summer. Should the Mets move on from starting second baseman Daniel Murphy after this season, Herrera is the leading candidate to replace him.
Tovar, 23, spent most of last season at Double-A Binghamton, where he hit .282 with a .690 OPS.
Bowman, 23, reached Las Vegas for the first time last summer, finishing 10-8 with a 3.22 ERA in 24 outings (23 starts) over two levels. A former 13th-round Draft pick out of Princeton, Bowman is known for his Tim Lincecum-like delivery, which he used to produce a 3.60 ERA in three Grapefruit League outings.
Pill, 24, started Saturday's game in place of injured starter Zack Wheeler, blanking the Nationals over 2 1/3 innings. Like Bowman, Pill briefly reached Las Vegas last season, after posting a 3.83 ERA in 22 outings at Binghamton.
Robles, 24, posted a 4.31 ERA at Binghamton last summer; Satterwhite, 28, pitched exclusively in relief for the B-Mets; and Ynoa, 21, posted a 4.07 ERA in 25 starts split between Binghamton and Class A Advanced St. Lucie.