Crossword puzzle clue "shade suppliers for baseball players and coaches"

Shade suppliers for baseball players and coaches?

Artist and chess player who said "While all artists are not chess players, all chess players are artists"

Concern of boxing and tennis coaches?

Last name of father-and-son N.F.L. coaches

Coaches who give pointers to hurlers? (trade 3 and 8)

Like MP3 players, not CD players

Some AL players, but not NL players

Oil suppliers