kyle wellwood
Different players from different clubs wear the number 4 jersey. Phil Jones wears the number 4 jersey for Manchester United, Fabregas for Chelsea, and Per Mertesacker for Arsenal.
robbie keane
There have been 106 players from the NBA or ABA who have worn the jersey number 50. Some notable players are Emeka Okafor, Zach Randolph, and David Robinson.
John Terry
Alex Ovechkin (Washington Capitals).
Phil Esposito when he played for the Boston Bruins.
Nobody
No. Why? Probably same reason a Basketball, Football, Hockey, Soccer, and Softball players do not wear it either. It is simply not neccessary.
for a custom nfl jersey
kyle wellwood
Defensive linemen
You have Patrik Elias on the Devils as one.
Different players from different clubs wear the number 4 jersey. Phil Jones wears the number 4 jersey for Manchester United, Fabregas for Chelsea, and Per Mertesacker for Arsenal.
alex rodriguez
torres/ carrol
robbie keane