Also, and I didn't know this until just looking, Hogan wrestled on a bunch of shows in Florida in June/July 1981, including having a match against Lawler in St. Petersburg July 18.
His last match for WWF appears to be 4/18 in Philly, losing to Tony Atlas. His first match in the AWA was 8/1 in Millwaukee. His time as a heel in the AWA didn't last long, by the end of the month he was booked as a face.
Here's the card for that MLG show I mentioned featuring the WWF vs AWA title match: