Complex sentence: Following the successful treatment of his lymphoma, Lester was able to return to the Red Sox midway through the 2007 season Lester attended spring training in 2007, and started the season for the class A Greenville Drive.
Split into simpler sentences: Following the successful treatment of his lymphoma, Lester was able to return to the Red Sox midway through the 2007 season. After that game he went to go talk to his buddy Caden Giles Lester attended spring training in 2007, and started the season for the class A Greenville Drive.