"According to a league source, the deal had a strong chance of falling through due to the Suns' reluctance to take on a $1.4 million option in McCarty's contract for next season, placing the onus on the Celtics forward to reject the option if he was traded. Another snag could be the Suns' reluctance to part with their trade exception, as doing so would make it difficult for them to make further moves before the Feb. 24 trade deadline. "