NEW YORK -- Sandy Alderson said Bartolo Colon's trade value could go up as time goes on.
It could. But not this week.
Colon followed two strong starts with one of his worst of the season, allowing six runs and failing to make it out of the fifth inning of the New York Mets' 9-0 Sunday afternoon loss to the San Francisco Giants.
It was Colon's first chance at his 200th career win but ended up as his 137th career loss.
The Giants hit Colon hard, with home runs from Hunter Pence and Brandon Belt and doubles from Pence and Buster Posey. The Mets did not hit Giants starter Madison Bumgarner hard, although for the first time this weekend they didn't wait until the late innings to get their first hit. Wilmer Flores doubled to lead off the third inning.
Bumgarner retired 13 in a row after the Flores double before David Wright's broken-bat single in the seventh. He finished with a complete-game two-hitter.
The Mets have lost two of the first three games in this four-game series, falling back to five games under .500 (53-58). They were shut out for the 10th time this season.
The bad Bartolo: Colon relies heavily on location, so when he's off, the results can be ugly. Sunday's start was the fourth time this season he has allowed six or more runs. His ERA in his other 18 starts is 2.78.
Colon's ERA in his 10 wins is 1.74, according to the Elias Sports Bureau. His ERA in his other 12 starts is 6.91.
Pence has been a problem for Colon before. The Giants right fielder is now 5-for-8 against Colon with a double, two homers and two walks.
The bad Mets: Except for one big seventh inning Saturday, this has been a horrible weekend for the Mets' hitters. They had just two hits against Ryan Vogelsong on Friday and didn't have a baserunner against Jake Peavy until the four-run seventh Saturday. They were just as outmatched Sunday by Bumgarner.
Clip and save: Colon's next start will come Friday in Philadelphia, when he will again try to become the third Dominican-born pitcher to reach 200 wins (Juan Marichal and Pedro Martinez are the others), the third active pitcher with 200 wins (Tim Hudson and CC Sabathia) and the third pitcher to earn his 200th win while pitching for the Mets (Orel Hershiser and Martinez).
Colon's 199th win came Thursday against the Phillies.
What's next: The Mets and Giants complete this wraparound series with a 12:10 p.m. ET game Monday. Dillon Gee (4-4, 3.77 ERA) and Giants right-hander Tim Hudson (8-8, 2.71) are the scheduled starters.