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Casey Janssen and Marcus Semien celebrate their birthdays today

Yahoo Sports • 1 min read • Latest: Sep 17, 2026, 7:14 PM

Last updated Sep 17, 2026

Casey Janssen and Marcus Semien celebrate their birthdays today

Summary

Casey Janssen turns 45 years old today, noted for his impactful MLB career, primarily with the Toronto Blue Jays. Janssen made his debut in 2006 and became the team’s closer from 2012 to 2014, ranking fifth all-time in saves for the franchise. Joining him in birthday celebrations is Marcus Semien, who turns 36 and had an outstanding 2021 season with the Blue Jays, earning Silver Slugger and Gold Glove awards. He signed a seven-year contract with the Rangers following that season, but has faced challenges this year with the Mets. Today marks a celebration of their contributions to baseball.

Source Links

Yahoo Sports

Status Watch

•Casey Janssen celebrates his 45th birthday today.
•Janssen ranks fifth on the Blue Jays' all-time saves list.
•Marcus Semien turns 36 and had a standout 2021 season.
•Semien signed a seven-year deal with the Rangers after 2021.
•Both players have made notable contributions to their teams.

Latest Updates

7:14 PMYahoo Sports — Happy Birthday Casey Janssen and Marcus Semien

What they're saying

"
Casey Janssen turns 45 today. He has always been one of my favourites, and a favourite among readers of this site. Long before I joined, the site even interviewed him back in 2008. Janssen was selected in the fourth round of the 2003 draft out of the University of California, during the J.P. Ricciardi era. […]
— Yahoo Sports

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