Ollie Clarke volleyed a late winner to give 10-man Bristol Rovers a 2-1 victory over Walsall at the Memorial Stadium.The midfielder shot home from eight yards in the 86th minute after a cross from the left rebounded into his path off a Walsall defender.Rovers had gone in front after only five minutes when a slip by Jon Guthrie allowed Rory Gaffney to latch on to a long ball from Chris Lines and advance to beat Mark Gillespie with a neat chip.But Walsall had the better of the opening half and should have equalised four minutes before the break when Luke Leahy headed badly wide from an Erhun Oztumer free-kick.The Saddlers equalised after 58 minutes when James Wilson rose to nod home a Joe Edwards corner and looked the more likely winners when Rovers goalkeeper Sam Slocombe was shown a straight red card from bringing down Amadou Bakayoko soon after.But young replacement keeper Alexis Andre made a couple of important saves and Clarke's winner deprived Walsall of a deserved point.