Lehigh, ranked No. 12 in the AP Division I-AA poll, came into the game riding a 14-game winning streak and would not be denied in its attempt to continue it.
Paralyzed by a running game that averaged less than a yard per play on 26 carries, Princeton was shut out 31-0 and suffered its worst defeat since 1986, when it lost 37-0 to Northwestern.
The Tigers' 0-2 overall start and their 0-2 start at home is their worst since Princeton Coach Steve Tosches arrived in 1987.
Lehigh's 15-game winning streak is the longest current streak in I-AA.