Photo: Matt Kartozian/USA TODAY Sports

With just under a month until Opening Day of the 2024 MLB season, there are still questions surrounding the Chicago Cubs' starting rotation. Will Jameson Taillon, who has yet to appear in a Spring Training game, will be ready by Opening Day?

Cubs fans now know why the right-hander hasn't jumped into Cactus League action. Maddie Lee of the Chicago Sun-Times reports that Taillon is working on a mechanical issue in his delivery and dealing with tightness in his calves.

After joining the Cubs last offseason, Taillon's first half of the 2023 campaign was shaky as he posted a 6.15 ERA before the All-Star break. However, from July 18 to the end of the season, he logged a 3.70 ERA with 77 strikeouts and 19 walks in 82.2 innings of work. Overall, Taillon had an 8-10 record, 4.84 ERA, 1.276 WHIP, and 140 strikeouts across 154.1 innings.

Maybe it’s much ado about nothing, but for a veteran who signed a four-year $68 million contract with expectations of being a top-of-the-rotation arm, coming into camp with mechanical issues could be a red flag. Taillon reportedly threw three innings in a simulated game on Monday, so the hope is that he's just polishing a few minor issues.

If the Cubs plan to make any noise in 2024 and win the Central Division, the starting rotation must fire on all cylinders. That includes a bounce-back season from Taillon.

More must-reads:

TODAY'S BEST
Struggling Cubs reliever placed on injured list 
Report: Justin Fields had ‘toxic' relationship with ex-Bears QB
Extension makes Lions QB Jared Goff one of NFL's highest-paid players
Kentucky's Reed Sheppard displays excellent skills at NBA Draft Combine
Knicks big man undergoes another ankle surgery
Flames CEO stepping down, transitioning to advisory role
Oilers star seemingly dismisses Arturs Silovs' performance in Game 3
Bengals QB Joe Burrow is making a notable change to stay healthy in 2024
Orioles designate outfielder for assignment
Antoine Winfield Jr. agrees to record contract extension with Buccaneers
Bears coach provides massive update on QB Caleb Williams' progress
Rookie camp sheds light on Patriots' efforts to develop Drake Maye
First game of 2024 NFL season features rematch between two AFC powerhouses
Bronny James receives medical clearance, expected to remain in draft
Nuggets teach Timberwolves it's never easy to knock out the champion
Panthers come from behind to take Game 4 vs. Bruins
Hawks win 2024 NBA Draft Lottery
Watch: Padres star passes father on all-time home runs list
Terrion Arnold honors his mother in a unique way
Brad Keselowski breaks 110-race winless streak at Darlington