Does it matter?

[Skittles1101]

Does it matter that my male BP whose age im not sure of is only about 125?

Maybe, maybe not. Pics would help. If this guy is as tiny as it sounds fuzzys maybe ok.
@ the OP, the rodent should be as big or slightly larger then the thickest part of the snake.

125 grams. Definitely needs more than a fuzzy every other week.