Sophomore Mike Dryden spelled Madden and was effective, limiting the Eagles to one earned run on five hits, walking none, over the last four innings.
Madden (1-2) went two innings, giving up seven earned runs on seven hits, all with no outs in the third.
Harvard led 2-0 after two, on the strength of junior designated hitter Jeff Bridich's two-run home run, which also scored Keck.
The Crimson continued to get nice production from Mager, who in the last four games has played shortstop, third base and left field.
Mager hit a two-run triple in the fifth, scoring Carey and sophomore right fielder Scott Carmack. He is now hitting .320 with 13 RBI, and has also stolen five bases.
Huling, second on the team in batting average at .375, helped the Crimson close to 12-6 with a two-run home run, his team-best fourth of the season, in the seventh inning.
Langone toiled through a complete game, allowing 10 hits and six earned runs while striking out seven to improve to 4-3.
"I don't know what's wrong with our hitting," Carey said. "I think it's a combination of things, like trying to find a lineup that works and not doing the little things as well."
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