Keegan told the Evening Chronicle: "Andy didn't play on Monday because I've got him in the first-team squad and we didn't want him to get injured.
"He's done very well - I like him.
"He gives us something different to what we've got in the forward department.
"And that's why he's involved."
Reserve team coach Adam Sadler said: "Andy has got four goals in four games since returning from Preston on loan and has been pushing for a first-team chance.
"It would be great if he can do that at some stage."