In his two stints as a manager in the major leagues, one in Texas and one in New York, Bobby Valentine turned the teams around almost instantly.
Before Valentine took over in Texas they had won 62 games. In his first season at the helm, the Rangers won 87 games, a 25-game improvement in just a year.
In 1996 Valentine took over the Mets in last months of the season and the team ended with 71 wins. His first full year coaching in New York, the Mets won 88 games, a 17-game improvement.
Now the Red Sox are not as bad off as the Mets or Rangers were before Valentine took over but his track record of turning around teams instantly is something to be excited about.