The fourth-year junior and former walk-on has 363 rushing yards and five touchdowns this season for the Scarlet Knights (3-1), who play host to Tulane on Saturday.
James had 96 yards on seven carries against Navy before he was hit in the knee by a defender's helmet in the second quarter.
He ran for 881 yards and nine touchdowns last season despite missing four games with a broken bone in his leg.
Rutgers coach Kyle Flood says RB Paul James has torn ACL, out for year. — Keith Sargeant (@KSargeantNJ) September 21, 2014
- Chris Mascaro