Originally written by Steve Winwood and Jimmy Miller and recorded by the Spencer Davis Group for their 1967 album of the same name.

The Chicago Transit Authority (who later shortened their name to Chicago) recorded a cover version that appeared on their 1969 debut album, it was the 'B' side of the re-released single 'Questions 67 and 68'  but it did get some radio airplay and actually reached #49 on the Billboard charts.

Here is my 'Got Ya Covered' video of the week 'I'm a Man' by Chicago Transit Authority

I also included the original version below.