Adding 5 more to the list:

1990 White Sox end-of-season black GU cap #17 Dave Gallagher (the Sox wore the black and silver uniform design with the black caps for the last home stand of 1990). Sz. 7 1/8, moderate wear.
Late 1980s Denver Zephyrs (AAA) green w/blue brim #29, sz.7 1/2, moderate wear
C. 1992 Giants #42 Mike Jackson, sz. 7 1/4, modrate-to-heavy wear
1999-2000 Braves BP cap #11, sz 7 1/4, moderate use
Early 2000s Casper Rockies, no #, light wear, sz. 7 3/8

Still available from the original list:
Both no# Cubs caps
Rockies Dave Collins w/US Flag
Indians Dave Nelson
Blue Jays #17.

$2 shipping for one...$3 for 2 or more.

Dave Miedema
sox83cubs84@hotmail.com