Justin Verlander

Detroit Tigers · P · Free agency eligible

10 seasons of his career are presumed from his debut date rather than read from transactions, so this figure is less certain than most.

Season by season

Season	Club	Days	Running total	How this season is known
2005	Detroit Tigers	91	0.091	Presumed from debut
2006	Detroit Tigers	172	1.091	Presumed from debut
2007	Detroit Tigers	172	2.091	Presumed from debut
2008	Detroit Tigers	172	3.091	Presumed from debut
2009	Detroit Tigers	172	4.091	Presumed from debut
2010	Detroit Tigers	172	5.091	Presumed from debut
2011	Detroit Tigers	172	6.091	Presumed from debut
2012	Detroit Tigers	172	7.091	Presumed from debut
2013	Detroit Tigers	172	8.091	Presumed from debut
2014	Detroit Tigers	172	9.091	Presumed from debut
2015	Detroit Tigers	172	10.091	From transactions
2016	Detroit Tigers	172	11.091	Carried forward
2017	Detroit Tigers, Houston Astros	172	12.091	From transactions
2018	Houston Astros	172	13.091	Carried forward
2019	Houston Astros	172	14.091	Carried forward
2020	Houston Astros	172	15.091	From transactions
2021	Houston Astros	172	16.091	From transactions
2022	Houston Astros	172	17.091	From transactions
2023	Houston Astros, New York Mets	172	18.091	From transactions
2024	Houston Astros	172	19.091	From transactions
2025	San Francisco Giants	172	20.091	From transactions
2026	Detroit Tigers	154	21.073	From transactions

172 days credit a full year, so a season adds at most 1.000 no matter how long a player is on a roster. 3.000 years reaches salary arbitration and 6.000 reaches free agency.

This figure is an estimate reconstructed from public roster transaction records. It is not an official MLB or MLBPA figure — those are not published. See the methodology. Last updated 2026-08-25.

Independent project, not affiliated with or endorsed by Major League Baseball or the MLBPA.