Source: Team_Talk
Chilvers boost ahead of Albion test
Chilvers was replaced during the second half of Tuesday's 2-1 home defeat against Reading after picking up a dead leg, although Irvine said: "I would expect he will be okay for Saturday."
The North End boss could ring the changes after a dismal first-half display against the Royals but he will again be missing a trio of players through injury.
Left-back Callum Davidson is ruled out for several weeks with a torn hamstring and midfielder Barry Nicholson remains a long-term absentee with a broken leg.
Winger Paul Parry also tore a hamstring in the recent 2-0 home win over Swansea and will remain sidelined too.