Agnew completed 16 of 20 for 147 yards with no interceptions and Smith finished with seven receptions for 101 yards. Juwan Washington had 22 carries for 85 yards and added a 3-yard touchdown catch for San Diego State (4-1, 1-1 Mountain West).
The Aztecs limited Colorado State (1-5, 0-2) to 235 total yards and just 18 rushing. Kyahva Tezino had 13 tackles and a forced fumble and Luq Barcoo had three interceptions for San Diego State -- on three consecutive defensive snaps.
Matt Araiza hit a 22-yard field goal and Colorado State's Cayden Camper answered with a 36-yarded to make it 3-3 at the end of the first quarter. Agnew hit Smith for 8-yard TDs early in the second and third quarters before Washington's scored with 13:07 left in the game made it 24-3.
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