Who should the Mets demote to make room for Mejia?

After struggling a bit in May and the beginning of June, Hansel Robles has become one of the Mets’ most reliable relievers and has been one of the pitchers Terry Collins has relied on in the late innings.

While harnessing his fastball (which has averaged 96 MPH) and his slider (which he’s thrown roughly 30 percent of the time), Robles has allowed just two runs over his last 9.1 innings of work dating back to June 14.

Overall, Robles has posted a 4.37 ERA and 1.19 WHIP in 22.2 innings pitched (26 appearances), though his 3.17 FIP suggests he’s been a bit unlucky.

Robles has options remaining, so the Mets can send him to Triple-A Las Vegas without issue. However, doing so would deprive them of someone who’s been arguably their second best reliever over the last month. In other words, it shouldn’t happen.

Next: What about Verrett?