Marcus Semien

Marcus Semien

35-Year-Old Second Baseman2B
New York Mets
2026 Fantasy Outlook
Semien's walk up song should have been Bob Seger's, "Like a Rock," because from 2015-2024, that is exactly what he was. He had an IL stint in 2017, but otherwise played in nearly every game possible for Oakland and Texas. That all came to a crashing end in 2025 as his worst statistical season on record finally came to a merciful end in August with a foot injury. Semien has played more games than any other active second baseman in baseball since 2015, and we know the position is not a forgiving one to older players. Semien enters his age-35 season in a new league and city after getting dealt to the Mets for Brandon Nimmo this offseason. He still has the foot speed, but the quality of his contact continues to decline, thus costing him one of those coveted higher spots in the lineup. He was a four-category contributor last season, but nowhere near his previous levels. We only have to look to George Springer's 2025 renaissance to be reminded of how dangerous it can be to write off aging players so quickly. We are not recommending taking Semien for his previous volume or stature, but he's a likely everyday player with the upside to log the sixth 20/10 campaign of his career. Read Past Outlooks
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