Chicago Cubs release former ace Jake Arrieta after rough return to team
LEADING OFF: Red-hot Cubs visit Giants, Yanks' Cole vs. Rays
Former Cubs pitcher Jon Lester: I got to play for amazing teams in Chicago
MLB Rumors: Jon Lester has retired - Lone Star Ball
Cubs give Jon Lester the 'Dear Jon' treatment - Chicago Sun-Times
Former Cubs pitcher Jon Lester retires after 16 seasons
2021 Fantasy Baseball: Chicago Cubs Team Outlook - Pitching Staff Shortcomings Hold Back Growth Potential - Sports Illustrated
John Lackey, St. Louis Cardinals cool off Chicago Cubs 4-0 in NL Division Series opener
If the Cubs plan to have success in October, they need this Jon Lester - Chicago Sun-Times