Barry Corr’s eighth goal in nine games helped Southend United beat Mansfield and kept alive their slim League Two automatic promotion hopes.
Michael Timlin’s pass allowed Corr to lift the ball past Lenny Pidgeley before Will Atkinson tucked in a rebound for the second.
Vadaine Oliver’s header against the bar was as good as it got for Mansfield, who are six points above the drop zone.
Southend are eight points off third-placed Wycombe, with a game in hand.
Mansfield Town manager Adam Murray told BBC Radio Nottingham:
“We gave everything we could, but we came up against a side that were better than us in certain areas.
“We matched them for large parts, but we got punished for little errors like we have done for the majority of the season.”