I can't think of what this guy could possibly have. Does anyone even consider calling?

PokerStars Game #2792628913: Hold'em No Limit ($2/$4) - 2005/10/13 - 04:14:03 (ET)
Table 'Lumen II' Seat #9 is the button
Seat 1: dsaxton ($407.65 in chips)
Seat 2: rdegs21 ($400 in chips)
Seat 3: 7D~DoC ($225.95 in chips)
Seat 4: earnstaf ($497.50 in chips)
Seat 6: jrfox ($482.65 in chips)
Seat 8: bigpaul456 ($491.85 in chips)
Seat 9: Magglio12 ($471.50 in chips)
dsaxton: posts small blind $2
rdegs21: posts big blind $4
noo limit: sits out
*** HOLE CARDS ***
Dealt to dsaxton [Jc Jh]
7D~DoC: folds
earnstaf: folds
jrfox: folds
bigpaul456: folds
Magglio12: folds
dsaxton: raises $8 to $12
rdegs21: calls $8
*** FLOP *** [3d 7s 5c]
dsaxton: checks
rdegs21: bets $12
dsaxton: raises $20 to $32
rdegs21: calls $20
*** TURN *** [3d 7s 5c] [8d]
dsaxton: bets $24
rdegs21: calls $24
*** RIVER *** [3d 7s 5c 8d] [Ks]
dsaxton: bets $24
rdegs21: raises $308 to $332 and is all-in
dsaxton: ???