Some of Francis Capra's tattoos are real. When the guys all watch Logan's mom jump off the diving board, the viewers can see Weevil's left shoulder. A tattoo of a cross with the name Capra is on the shoulder.
The final hand between Logan and Weevil, Logan states that with 42 cards remaining, he could win with 40 of them. With Logan holding A clubs J clubs, Weevil A diamonds 2 of diamonds board 6 clubs Q clubs 4 diamonds K hearts, they would have split if another 6 came with both players having 66AKQ or if the 4 of spades or 4 of diamonds for 44AKQ, making Logans true number 35 to win.
At the end of the poker game, Logan says there are 42 cards left in the deck. In fact, there are 5 players with 2 cards each and 4 up on the table after the turn. This leaves 38 (52-14=38). He is also wrong about how many ways he could win.
Keith mentions that he spoke to Sadie Casablancas. But in reality, her name was Betina. There is no Sadie.