Rajon Rondo Rocks Short Sleeve Suit Jacket to Bulls Game (PHOTO)

Rajon Rondo rocked a short sleeve suit jacket to the Bulls game Friday night ... and we gotta say -- kinda swag!!!

Ronda is currently nursing an injured thumb and has a cast on his right hand that might prevent him from fitting his arm into a regular full sleeve.

So, he made an adjustment and went short-sleeved ... and totally pulled it off!