Channing Frye had a "welcome to the NBA" moment before he even made it to the league ... 'cause he claims Richard Jefferson racked up a whopping $36,000 tab on his credit card the night before he was drafted!!
The pair of Cavs champions/former Arizona Wildcats detailed the 2005 rager on their "Road Trippin'" podcast this week ... when RJ invited Frye and his crew of 20-30 friends to go clubbing in the Big Apple.
The former No. 8 overall pick says the group included a ton of ex-Arizona guys like Gilbert Arenas and Luke Walton, Nets and Knicks players and fellow class of 2005 draftee "David Lee's punk ass" (R.