Jon Lieber pitched four full seasons for the Cubs from 1999-2002, and returned briefly in 2008. In 2001, a year where the Cubs led the NL Central for a couple of months, Lieber was a 20-game winner (back when that meant something), the last such season in Cubs history, and posted a 3.80 ERA. That might not sound great now, but in the high-charged offense of that ERA, it was good enough to get him an All-Star nod and fourth place in NL Cy Young voting.
The following year, Lieber began on basically the same track. And on June 21, he did something that no Cubs pitcher or team has been able to do at Wrigley Field since — throw a complete game, nine-inning victory in less than two hours.