Who gets called up?

In light of the recent Odalis Perez implosion and severe bullpen struggles as a result of starters not going deep into games, the topic of calling up a starter from Triple-A Vegas has come up. The choice is twofold: veteran Aaron Sele or rookie Chad Billingsley.

Up till last night, I would have bitten the bullet and gone with Sele, if nothing else to provide a softer entry for Billingsley later in the season and perhaps in a long relief role, rather than starter. However, according to LA Times, it seems like the Dodgers have other plans for the veteran:

"After a strong showing in spring training, Sele agreed to
go to Las Vegas for a month, hoping a need
would arise with the Dodgers."

and

"That leaves Sele with a decision. The Dodgers had
a gentleman's agreement with him to grant his release
if he wasn't called up by May 1. After he pitched five
scoreless innings April 30, he said goodbye to his
Las Vegas teammates.

General Manager Ned Colletti has tried to trade him,
but Sele's $900,000 major league salary has made
a deal prohibitive."

To me the season is too young to put so much pressure on Billinsley. He has only pitched five games (and is 3-0 with a miniscule ERA) in AAA Vegas to date this season. Grady Little has been very explicit about calling up guys from the minors to stay in the big club, not to be sent back down after a couple of games.

Given all the above, I honestly believe the Dodgers will either call up D.J. Houlton for a couple of spot starts to get Odalis Perez's juices going, or will refrain from any demotions and do or die with their struggling left-handed starter, at least for a month or so. How many games can he blow or how quickly will he turn around is anybody's guess at this point...