Just doing the numbers and the only way sonny met Al would’ve been as a young pre teen kid. Al moved to Chicago in the 1920s then Alcatraz after in the early 30s. Sonny was born circa 1919. Al then lived in Miami after Alcatraz with his mind gone. On a side note sonny is so old, looking at the era he came up in he must’ve seen it all, stories would be insane to listen to.

Joe Bonanno definitely knew capone though. From his stature with maranzano in the early days up until being an original 5family Boss and the way he describes him in the 60 minutes interview (as a jolly fellow if I remember rightly) he definitely knew him I reckon.