Jonathan Tyler Lester (born January 7, 1984, in Tacoma, Washington) is a left-handed starting pitcher in Major League Baseball who plays for the Boston Red Sox. Less than two years after being diagnosed with lymphoma, Lester pitched the final game of the 2007 World Series, and in May 2008, threw a no-hitter against the Kansas City Royals.

Lester attended Bellarmine Prep in Tacoma, Washington, where he was a three-time MVP and three-time All-Area selection. In addition he was named Gatorade State Player of the Year for Washington in 2000.

The Red Sox drafted Lester in the second round (No. 57 overall) of the 2002 draft and gave him the highest signing bonus of any second-rounder that year, $1 million.