51s drop 4th straight as Salt Lake trip nears an end

With Corey Oswalt and Chris Flexen, two Las Vegas starters both on the 40-man roster, having pitched too recently to make a start Monday, the Mets instead tabbed P.J. Conlon to fill in for deGrom. That sent the 51s into a bullpen game against Salt Lake, as Conlon was supposed to start Sunday.
Source: google