STAGS shot-stopper says his side must cut out the costly defensive errors to mount a major promotion push.
Mansfield Town have so far failed to keep a clean sheet this season and have been blighted by conceding costly goals from set-piececs.
The lapses in concentration were once again punished on Tuesday night when Stags had to settle for a share of the spoils against promotion-chasing Luton after switching off at a free-kick.
Said Marriott: “We do not have many points for the performances we have put in the league table does not reflect how we have played.
“We have switched off at set-pieces and been punished for them.
“Really we should have seven or eight points more, which is a bit soul-destroying.
“Braintree had one set-piece which cost us and we switched off against Luton. We need a clean sheet to built on.”
And the ex-Lincon City goalkeeper is backing new loan defender Ben Futcher, a former team-mate at Sincil Bank, to help steady the defensive ship.
“Futcher is an organiser and a great leader on and off the field and that is something we need,”said Marriott.
“He is an excellent player at this level. We are good friends off the pitch and it certainly helps having your mate in front of you.
“At the moment we need to cope better with set-pieces, it is something that cost us last season.
“It is a case of learning from our mistakes.”