Delap is confident the experienced striker, who scored 40 goals in 89 appearances for England, can help Tony Pulis' side make the step up to the next level.
He told The Sentinel: "Michael has been at big clubs all his career and bringing that experience into the dressing room can only help.
"It's getting that winning mentality that all the big clubs have.
"Teams at the bottom of the table still want to win, of course they do. But it is a case sometimes of working out how to win."