Revell had a purple patch early last season, but since October 16 he has scored 4 goals in 39 appearances.
In the same period Richards has made 51 appearances.... (Revell was out for a long time with an injury) and has scored 14 goals.
Do you know how that translates to minutes per goal Grange?
I'm guessing Richards 51 appearances include a large number from off the bench.