In a way, Mike Pelfrey and Vance Worley are doing the Twins a favor. They're the ruler slaps across the knuckles that remind the transgressor of the rule.
Here's the rule: When big-league starters are available, you probably don't want them. They're like the burned hot dogs that sit on the back of the grill all day at a yard party. Nobody has touched them for a reason.
There are exceptions to this rule, including Carl Pavano performing well for the Twins in 2010 and Kevin Correia giving the Twins a couple of good months to start 2013, but they are short-term exceptions.
If a big-league team is willing to trade a starting pitcher in a business where the motto is ''You can never have too much pitching,'' there is something wrong with the guy.
If a pitcher becomes available in free agency, he will be overpriced and risky, because signing him will require outbidding 31 other teams for a player who has logged enough innings to drive up his price.
Trading for Worley seemed logical. The Twins sent a center fielder who is not in their long-term plans, Ben Revere, to Philadelphia for a starting pitcher who two years ago finished third in the National League rookie of the year voting while performing in a pennant race.
This week, the Twins, citing Worley's 7.21 ERA, sent him to Class AAA. It turns out that all you needed to know about Worley was that the Phillies were willing to trade him.
Signing Pelfrey seemed logical. He's been a winner in the big leagues, and undergoing Tommy John surgery a year ago made him affordable and available. It turns out all you needed to know about Pelfrey was that he was affordable.