Charles Vernam's 85th-minute winner gave play-off chasing Grimsby a 1-0 victory over 10-man Notts County at Meadow Lane.
After striker Lee Ndlovu was shown a straight red card with 14 minutes to go for a high boot on Harvey Rodgers, Vernam settled the contest by finding the bottom corner from 18 yards.
A Cagey Opening Gives Way to Chances
A far more open second period stood in contrast to a low-quality first half, with Grimsby immediately going close twice in quick succession minutes after the break.