What was the tv comedy that on in late had a boy named Mike and his father Dr it real popular?

The TV comedy you're thinking of is "My Two Dads" (1987-1990).

The show featured a young boy named Michael "Mike" Taylor (played by Paul Provenza), who is raised by two very different men who both claim to be his father:

* Dr. Norman "Norm" Cooper (played by Greg Evigan), a successful and wealthy physician.

* "Mac" Taylor (played by Stamos), a charming but irresponsible musician.

The show focused on the comedic chaos and heartwarming moments that arose from their contrasting personalities and parenting styles.