What Jersey Number is the least worn in the history of Major League Baseball?

Answer 1

The number 86 is the only number left in the NHL between 00-99 that has never been used.

Edit: The answer above is wrong. Every single number between 00-99 has been worn. The last number that wasn't worn was 84, which Guillaume Latendresse wore with the Canadiens. Mikael Grabovski wears it with the Maple Leafs currently.

There have been 3 players who have worn the number 86: Jonathan Ferland for the Canadiens in 2006, Jeremy Williams for the Rangers in 2011 and Wojtek Wolski for the Phoenix Coyotes and New York Rangers currently.

Answer 2

In theory, a Baseball player can wear any number he desires between 0 and 99. In U.S. MLB, however, lower numbers are considered more prestigious, so fewer people wear high numbers. Mitch Williams is one the few who wore #99, for example, and I guess there are a few numbers in the 90s that nobody has ever worn.