The Athletics did not extend the $18.4 million qualifying offer to Mark Canha by Sunday's 2 p.m. PT deadline.
The outfielder now is a free agent.
Canha, who turns 33 years old in February, played 141 games for the A's this past season. He slashed .231/.358/.387. His 17 home runs were the second-most in his career. Canha tied or set career highs in doubles (22), triples (4), RBI (61), runs (93), hits (120) and stolen bases (12).
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Canha's 2.5 bWAR also was the second-best of his career.
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The Bay Area native and Cal product was acquired from the Colorado Rockies in December of 2014. He has spent his entire seven-year big league career in Oakland.
Canha is a career .244 hitter with a .776 OPS. He has 89 career home runs, averaging 13 per season so far.