Colorado (66-94) at New York (82-78)

Mike Jacobs and Aaron Heilman have each provided unexpected contributions to the New York Mets’ first winning season since 2001.

Each is hoping to make a lasting impression in the final weekend of the season as the Mets continue their three-game series with the Colorado Rockies.

Jacobs homered and Heilman earned the save in the Mets’ 3-2 victory over Colorado on Friday night, New York’s 82nd win of the season, which guranteed the team’s winning record.

Heilman, being given a chance to close after a solid season despite shuttling between the bullpen and the rotation, has five saves in six changes. Jacobs, whose first major league hit was a pinch-hit, three-run homer in his first at-bat on Aug. 22, has 10 homers and 22 RBI in 27 games.

However, despite a solid showing during the second half of the season, neither is promised a job next season.

An already crowded rotation for 2006 complicates things for Heilman, as the Mets aren’t sure whether he is better suited to starting or relieving. Jacobs could be left without a position if the Mets decide to pursue a veteran first baseman.

“For me, this is a huge opportunity to be up here and playing well,” Jacobs said. “If they don’t end up getting that guy they go after (in the offseason), I’ll be here. Every day I come with the mind-set that I’ve got to do something to show them that I belong here.”

Jae Seo, who will make his final start of the season on Saturday, is in a similar situation, as the Mets aren’t sure what they have in the Korean right-hander.

“To me, Jae’s still establishing himself,” New York manager Willie Randolph said. “This is my first time seeing him up close. So he still has to prove to me consistently that he can be the pitcher he has shown.”

Though the Mets have won each of Seo’s last two starts, he has struggled of late, allowing six runs and 15 hits over 11 innings in his last two starts.

Colorado’s defeat was its 94th of the season, equaling last year’s total.

In the loss, outfielder Matt Holliday hit a two-run homer, giving him a club-record 32 RBIs in September.

“Our young players give us reason to be optimistic for the future,” Colorado manager Clint Hurdle said. “Holliday continues to improve and should become a good offensive player.”