Christopher Salamone ran for three touchdowns in the second half, and South Portland made a goal-line stand in the closing seconds to secure a 20-13 comeback victory over Scarborough in a Class A South football game Friday night in Scarborough.

Scarborough (0-3) led 13-0 after Mitch McGarry anticipated a pass into the flat, picked it off and returned it 45 yards for a touchdown early in the third quarter.

Salamone, though, began South Portland’s comeback with a 53-yard run. In the fourth quarter, Salamone went up the middle for a 35-yard TD, and Christian Beausang’s second successful extra point gave the Red Riots (1-2) a 14-13 lead.

Salamone then scored on a 6-yard run with 2:24 remaining. South Portland went for a 2-point conversion in an attempt to take a two-score lead, but the pass was incomplete.

That gave the Red Storm one more chance, and they quickly moved into South Portland territory. After a pass interference penalty set up first-and-goal at the 4, Scarborough was stopped at the 1 on back-to-back plays. On third down with 15 seconds to go, an illegal procedure penalty pushed the ball back to the 6. Quarterback Oscar Goss was then tackled at the 1 after scrambling out of the pocket, and Scarborough couldn’t stop the clock because it was out of timeouts.

The only touchdown in the first half was on the opening drive. Scarborough held the ball for more than 10 minutes before Evan Moore scored on a 2-yard run.