A Bet After the Flop I Didn't Understand: Carlos Mortensen at the WPT

I picked up the entire second season of the World Poker Tour on DVD for $7 plus shipping from Daedulus Books. On the first disc is the Borgata Poker Open, featuring a number of outstanding players, including Carlos Mortensen. Early in the episode, Carlos made a play that puzzled me. It was a 6 seat table. Carlos is dealt 10 (clubs) and 8 (clubs), 2 players fold and 4 see the flop. The flop comes 2 (clubs), 3 (hearts), and 8 (hearts). There is $38,000 in the pot and Carlos opens the post-flop betting with with a $10,000 bet. This means of course, that the first caller needs to pay $10,000 for a chance at a $48,000 pot. That's 4.8 to 1 pot odds, which justify a call in many situations. With top pair (admittedly a middle pair), shouldn't Carlos have bet more to discourage callers and attempted to win the pot right there? As it happened, he was only called by David Opphenheim (holding A-4, offsuit), who eventually drew out on Carlos by hitting a 5 on the turn.