'Blues Brothers' Actor Charles Napier -- Dead at 75

Charles Napier -- who played bad ass Tucker McElroy in "The Blues Brothers" -- died yesterday ... one day after he collapsed at his California home.

Napier starred in a TON of Hollywood classics, including "Rambo: First Blood II" and "Philadelphia" ... also voiced Dr. Speltz on a recent episode of the F/X show "Archer."

It's unclear what caused Napier to collapse -- but he was reportedly hospitalized for blood clots just last year.