Jacob deGrom continued to go unrewarded during a record-breaking season, taking the loss despite allowing just two runs over seven innings on Tuesday night as the Mets fell to the Miami Marlins, 5-3, in the opener of a four-game series at Citi Field.
The Marlins, who had not played since Saturday because of back-to-back rainouts, won for just the fourth time in 12 games.
DeGrom (8-9), who has a chance to become the first starter to win the Cy Young Award with fewer than 13 victories, allowed three runs or fewer for the 26th straight start — the longest single-season streak in major league history. Leslie Cole had 25 straight starts for the Chicago Cubs in 1910. DeGrom gave up three hits and two walks and struck out nine as his major-league-leading E.R.A. rose to 1.71 from 1.68.
However, deGrom’s Cy Young case may have been damaged by a familiar lack of run support from his teammates, as well as an 11-pitch span in the fourth inning. Brian Anderson extended the fourth by legging out a two-out single — the first hit off deGrom. Derek Dietrich followed with a single to shallow left before Lewis Brinson broke the scoreless tie with a two-run double off the center-field wall.
DeGrom retired the final 10 batters he faced. He has thrown at least seven innings and allowed two runs or fewer yet failed to earn a win in 10 of his 29 starts this season.
DeGrom’s E.R.A. is more than half a run better than his two competitors for the National League award, the Philadelphia Phillies’ Aaron Nola (2.29) and the Washington Nationals’ Max Scherzer (2.31). But Scherzer (17) and Nola (16) rank first and second in the N.L. in wins.
The Marlins added insurance in the eighth, when J. T. Riddle hit a solo homer, and the ninth, when Anderson laced an R.B.I. triple and Dietrich followed with a run-scoring double.
Jose Urena (6-12) earned the win, allowing one run and four hits in six and a third innings.
Michael Conforto went 2 for 4 and hit a solo homer in the sixth for the Mets. He has gone deep in three straight games. Kevin Plawecki hit a two-run homer in the ninth.