The Elis toppled the Big Red behind the performance of outfielder Keith Caggiano, who blasted a three-run homer in the first game. Caggiano's performance earned him Player of the Week honors.
The Bears lost a tough contest, 8-2, against the Big Red before regrouping and winning the second game 5-4.
In the Lou Gehrig division, first-place Penn (17-12, 9-3) continued its dominating performance with an easy sweep of Dartmouth before struggling against Harvard.
The Quakers' loss in the second game against the Crimson allowed the second-place Tigers (10-14, 5-3) to gain crucial ground in the Gehrig race.
Princeton's easy victories over Brown and Yale left it only two games behind.
Struggling to hang on to third place, Cornell (10-16, 3-5) suffered a rough weekend, winning only one of its two games against Brown before being swept by Yale.
The Big Red remains only one game on top of the pathetic Lions (10-21, 4-8), who are in sole possession of dead last in the league.
Columbia's one win of the week, the 10-0 shutout of Harvard, was spearheaded by sophomore pitcher Chris Vogel, who tossed Columbia's first shutout of the season.