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(SportsNetwork.com) - Unable to give himself an early birthday present last time out, Madison Bumgarner looks to rebound on Sunday afternoon as the San Francisco Giants continue a four-game set with the New York Mets.

Bumgarner lost for the first time in three starts with a 5-0 decision to Pittsburgh on Monday. He had allowed only one run in his previous two outings, but was roughed up for five runs over four innings versus the Pirates.

The lefty, who turned 25 a few days later on Friday, gave up four runs during the first inning.

"That first inning is probably the most critical for a starting pitcher," said Giants manager Bruce Bochy. "(Bumgarner) is trying to get in sync and get his rhythm, and he was out of his normal rhythm. He had trouble hitting his spots, his stuff was a little flat, and they took advantage of it."

Bumgarner dipped to 12-8 with a 3.41 earned run average on the year and has been nothing less than stellar in three previous meetings with the Mets. He is 2-0 with a 1.80 ERA over that 20-inning timeframe with 23 strikeouts.

After surviving the non-waiver trade deadline and remaining with the Mets, 41- year-old Bartolo Colon takes aim at a third victory in a row.

The veteran right-hander has yielded three runs over 15 innings in back-to- back wins, and he scattered a run in 7 2/3 innings of work versus Philadelphia on Monday. Colon worked around 10 hits and a walk while striking out six, with an RBI double surrendered in the eighth inning ending his shutout bid.

Colon, though, still reached double-digits in victories, moving to 10-8 with a 3.88 ERA on the year. He is 2-1 with a 4.32 ERA in four previous encounters with the Giants.

The Mets won a pitcher's duel on Saturday 4-2 after both Jacob deGrom and Jake Peavy took no-hitters into the seventh inning, deadlocking this four-game set at one win apiece.

The rookie deGrom ended up getting the win after lasting a career-high 7 1/3 innings. He was charged with two runs -- both coming in the eighth frame -- and won his fifth straight start.

"I think we all have to start to understand that this kid is something special," said Mets manager Terry Collins. "Outstanding job tonight. He's an impressive kid."

The Mets were swept in three games at San Francisco from June 6-8 and bested the Giants for just the second time in the last eight meetings overall.

Peavy retired the first 19 batters he faced, but yielded four runs in the seventh inning, his final frame of work.

"There are a lot of positives," said Peavy of his outing. "But it's just hard to go on that right now with your team losing the game."

Daniel Murphy ended Peavy's perfect game and no-hitter with a one-out double to left in the seventh before David Wright muscled a single to left that put runners at the corners. Peavy plunked Lucas Duda to load the bases and Travis d'Arnaud sent a sacrifice fly to right that opened the scoring.

Juan Lagares then ripped a single through the hole in the left side that plated Wright for a 2-0 edge before Wilmer Flores cracked a two-run double into the left-field corner.

"That was a real big hit by (Flores)," said Collins. "It turned out to be a big run."

The Giants lost for the seventh time in nine games and sit second in the NL West, 3 1/2 games back of the Los Angeles Dodgers.