Did Bigjoe2003 Play this hand right ?? Pokerstars Step 6 HU

[11377]

Shouldn't he have pushed all in?? (he was multitabling 14 other sit n go while playing this 12k heads up in pokerstars step 6 )

Bigjoe rules !!!!

PokerStars Game #12927534260: Tournament #65581584, $2000+$100 Hold'em No Limit - Level IX (300/600) - 2007/10/29 - 21:28:35 (ET)
Table '65581584 1' 9-max Seat #2 is the button
Seat 2: quzzo (13974 in chips)
Seat 8: bigjoe2003 (13026 in chips)
quzzo: posts the ante 50
bigjoe2003: posts the ante 50
quzzo: posts small blind 300
bigjoe2003: posts big blind 600
*** HOLE CARDS ***
quzzo: raises 900 to 1500
bigjoe2003: calls 900
*** FLOP *** [Qh 2h 9h]
bigjoe2003: checks
quzzo: bets 1850
bigjoe2003: calls 1850
*** TURN *** [Qh 2h 9h] [2c]
bigjoe2003: checks
quzzo: checks
*** RIVER *** [Qh 2h 9h 2c] [4s]
bigjoe2003: checks
quzzo: checks
*** SHOW DOWN ***
bigjoe2003: shows [As 7h] (a pair of Deuces)
quzzo: mucks hand
bigjoe2003 collected 6800 from pot
*** SUMMARY ***
Total pot 6800 | Rake 0
Board [Qh 2h 9h 2c 4s]
Seat 2: quzzo (button) (small blind) mucked