Aston Villa's play-off hopes were dealt a blow as they fell to a 1-0 defeat against Cardiff City.
McCormack should be back in the Villa squad for Saturday's clash with Wigan Athletic, but Baker and backup goalkeeper Mark Bunn are expected to miss out.
Few expected Agbonlahor to still be contracted to Villa. Even fewer expected him to be playing for them.
The two strikers are both suffering with knocks ahead of Saturday's home game against Cardiff City, while Micah Richards is set to miss his sixth straight match due to a knee problem.
Villa went on to finish the campaign sixth in the Premier League.
Striker failed to impress in rare run out.
The forgotten striker made his first appearance of the season in the second city derby yesterday.
The experienced striker has not featured for the first-team for over six months due to a series of discipline and fitness problems.
The Aston Villa forward has not played for the club since March.
The two defenders are both set to sit out Saturday's home game against Fulham, while Albert Adomah is also a doubt for the match.