While the rest of the Yale defense held Valparaiso to only 55 yards on the ground on 35 carries.
Valparaiso scored its only two points of the game on a safety in the first quarter, when Walland was called for intentional grounding in the end zone.
Like Yale, Columbia (1-1) rebounded from its 24-7 opening week loss to Harvard thanks to a Towson (3-1) squad that was its own worst enemy.
Down 14-13 and driving in the fourth quarter, Towson quarterback Joe Lee coughed up a fumble that was recovered by the Lions' Greg Bown.
Tailback Norman Hayes came off the bench for Columbia to capitalize on the turnover with a two-yard scamper into the end zone that highlighted a 124-yard rushing day for the senior from California.
On the ensuing kick-off, Towson's Darnell Evans fumbled on the return, and Chris Schaefer recovered the loose ball, putting the game out of reach with an 11-yard touchdown return.
In the midst of a game marked by sloppy play, Columbia senior Justin Meadlin starred on punt returns following his return from major knee surgery that kept him sidelined for all but five minutes of the 1998 season.
Meadlin earned Ivy League Special Teams Player of the Week honors by opening Columbia's scoring with a 69-yard punt return for a touchdown. He finished the day with four returns for 116 yards.
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