James said the sleeves affect him on long-range shots, especially 3-pointers. He was quick to point out that the jersey also bothered him on Christmas Day, when he shot 0-of-4 from 3-point range in a win over the Los Angeles Lakers, and during the All-Star Game last month, when he was 0-of-7 on 3-pointers in sleeves.
"Every time I shoot it feels like it's just pulling right up underneath my arm. I already don't have much room for error on my jump shot. It's definitely not a good thing."
LeBron James of Miami Heat says sleeved jersey partly to blame for off night - ESPN