Question

add or remove commas, if necessary, until the sentence has correct punctuation. sideshow bob, ive been told is an excellent hockey player.

Explanation:

The phrase "I've been told" is a parenthetical element and should be set off by commas. The correct placement is around the parenthetical, not after the subject "Sideshow Bob".

Answer:

Sideshow Bob, I've been told, is an excellent hockey player.