Jon was born to John Lester and Kathie Lester. He went to Bellarmine Preparatory School in Tacoma of Washington.

Young Jon was interested in sports. His interests landed him on the school's baseball team. He was only 16 when he was named as the Gatorade State Player of the year for Washington in 2000.

The 1.93-meter-tall player has a love affair with baseball, and he started his career in 2006 with Boston Red Sox. He was recognized as one of the finest players of the team. He made Boston Red Sox proud by winning the final game of the World Series for the team. He was the player who helped Chicago Cubs to win the franchise's first World Series after 1908.

The player had to face a hard time in his career when he was diagnosed with anaplastic large cell lymphoma. The disease was fast spreading cancer of the lymph node. But he was lucky; the disease was curable. The doctors were able to discover this disease in Jon when they examined his back for a sore back.

Jon went under treatment for cancer. He went through chemotherapy and lost his hair due to which he saved his head completely. While Jon was recovering, he kept himself busy and enjoyed biking and fishing.

Jon made a comeback in the game and joined the team again in 2007. The player worked hard to bring himself back to the form. He travelled to Greenville South Carolina to meet up a team which could help him bring in form and there itself he met the love of his life, Farrah Stone Johnson. Later he married her on 9th January 2009. The couple has two children. His first son's name is Hudson and the second son is Walker.

The pitcher, Jon can deliver his pitches from a three-quarter arm slot. His deliveries are extremely hard to hit. He even met psychologist Bob Tewksbury to receive help to develop the discipline to better his career as a player.

Jon is a mentally tough player with strong determination. He was all over the sports news on 19th May 2008 when he pitched a no-hit against the Kansas City Royals. The Boston Red Sox made a victory with 7-0. This game was Jon's first complete game as a major leaguer.

The professional pitcher, Jon has maintained some amazing stats in the games. He was named All-Star games for continuously two years 2010 and 2011.

Jon is active in social medias like Facebook and twitter. His fans mostly love his tweets with his wife and children. Jon made a six-year contract of $155 million dollars with ChicagoCubs.The player currently draws the salary of $20 million and has the net worth of $55 million. The player beat cancer and won life with his strong determination. He is also associated with Oakland Athletics from 2014.