MIAMI — Southern Miss once again issued a Sunday smackdown to one of its Conference USA rivals.

LeeMarcus Boyd went 3-for-4 with a home run, two RBIs and three runs scored to lead the Golden Eagles to a 13-1 rout of Florida International in the finale of their three-game series on Sunday.

It was the third time in five C-USA series that Southern Miss (24-11, 10-4) has won by 10 runs or more on Sunday. One of its series finales was rained out.

With the win, Southern Miss also moved into second place in C-USA, a game behind Florida Atlantic.

Southern Miss was in control of this one through the middle innings, but didn’t turn it into a blowout until the seventh. Already leading 5-1, Southern Miss amassed six hits and scored eight runs while sending 13 batters to the plate.

Matthew Guidry drove in three runs in the inning with a pair of singles. The second brought in two runs to make it 14-1 and cap things off. Guidry finished the game 3-for-4 with three RBIs and two runs scored.

Florida International (17-19, 7-8) needed three pitchers to get through the nightmarish seventh inning. Starter Nick MacDonald (2-3) gave up the first four runs, Christian Santana allowed the last four, and Chandler Raiden finally got a pair of strikeouts to end it.

Southern Miss had no such pitching problems. Mason Strickland (1-0) allowed one run on four hits over the first four innings. J.C. Keys did not allow a hit or a run over the last three to earn his first save of the season.

Strickland and Keys combined for seven strikeouts and only walk. Keys struck out two of the three batters he faced in the bottom of the seventh inning to end the game via the Conference USA’s 12-run mercy rule.

Southern Miss’ pitching staff allowed runs in just two of the weekend’s 25 innings as the team won two out of three games in the series.

The Golden Eagles will complete a five-game road trip at 6 p.m. Tuesday when they visit Southeastern Louisiana University in Hammond, La.