Isaiah Thomas is the Little Engine That Could, except instead of saying "I think I can, I think I can..." he says "I know I can, I know I can..."
He's a mere 5'9" but plays with the swagger of a giant. Like most sub-6-foot players in the NBA, he uses his speed and quickness to offset his lack of length. In fact, he uses his diminutive stature to his advantage by splitting traps that larger players would struggle to find their way through.
Thomas is a master of the pick-and-roll, one of the league's bread-and-butter plays and something that was missing from Boston's attack before he arrived.