The 27-year-old impressed for Aston Villa on the weekend.
Leeds United visit Liverpool at Anfield on Tuesday night.
Divock Origi replaced Philippe Coutinho after the Brazilian was stretchered off in their 2-0 win over Sunderland and the Belgian opened the scoring.
Iwelumo played alongside the Sheffield Wednesday forward at Watford.
Manchester United and West Ham United drew 1-1 at the weekend.
Blackburn Rovers beat Newcastle United 1-0 at St. James' Park on Saturday.
Everton were beaten 1-0 by Southampton at St. Mary's yesterday.
West Ham United held their Manchester counterparts to a draw on Sunday.
The Frenchman is now in good form at Watford.
Nathan Baker has come into Aston Villa's first-team recently.