Sometimes, offseason acquisitions work out. Sometimes they don't. Sometimes, they are spectacular failures.
In 2000, the Red Sox were still seeking more rotation help. They swung a deal with the Colorado Rockies for Rolando Arrojo, who looked like a potentially decent starting pitcher. The Red Sox were able to make the deal because they were willing to take on Mike Lansing's bad contract.
Arrojo, who won 14 games with a 3.52 ERA and was an All Star in his rookie season with Tampa Bay in 1998, managed to win five games in 13 starts for the Red Sox that year, but he had a 5.05 ERA and only 44 strikeouts in 71.1 innings.
In 2001, Arrojo went 5-4 with a better ERA as an arm out of the bullpen. His strikeout rate was up. The next year, he had a similar role.
Arrojo was not a huge bust, but he was not the solid starter that he was expected to be when Boston picked him up.