Then Alabama flexed its own muscle to counter Manziel's speed, sticking with power runs to set up 2-yard touchdown runs by T.J. Yeldon and Lacy.
McCarron also converted a fourth-and-4 with a pass to Lacy to set up the first score. Alabama marched back down the field after C.J. Mosley pushed Manziel out of bounds a yard shy on fourth-and-6.
The Tide ran out all but 19 seconds with a methodical drive right back into the game.
It was still the first time Alabama had trailed at halftime since a loss at South Carolina in 2010.
Jeremy Shelley kicked a 28-yard field goal with 4:49 in the third quarter to cut it to 20-17 and Taylor Bertolet answered with a short one to start the fourth.