The Baggies will take on Championship side Bournemouth at the Goldsands Stadium this evening in the fourth round of the competition.
West Brom's opponents are in a rich vein of form having grabbed four Championship victories on the bounce, the latest resulting in an 8-0 drubbing of Birmingham City away at St Andrew's.
"It's a really important game for us," Irvine told the club's official website. "We want to get a good result and progress to the next round. We will put out a team of first-team players.
"As head coach I have to manage the whole squad and players who haven't been playing need to have a platform to impress."
The Baggies head into tonight's encounter on the back of two consecutive Premier League 2-2 draws.