No current NBA players wear number 28.
Marco Benelli - Golden State Warriors Omri Casspi - Sacramento Kings
Nobody baseball retired it.
Denis Rodman wore number 91 In the 2007-08 season, Ron Artest wears #93 for the Sacramento Kings.
number 0: Al Oliver (Baseball)
Nick Young - Washington Wizards
Giancarlo Stanton ( Miami Marlins)
josh hamilton, and Eric hinske.
There have only been two players ever in the NBA and ABA history to wear the number 49. They are Shandon Anderson and Mel McCants. There are no current players who wear the number 49.