As of the 2014 MLB season, Jacob deGrom is 26 years old.
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Jacob is 10 years old. it says in wikipedia.
As of the 2014 MLB season, Jacob Realmuto is 23 years old.
Jacob Burns is 33 years old (birthdate: April 21, 1978).
Jacob Wetterling is 33 years old (birthdate: February 17, 1978).
As of the end of the 2013-2014 NFL season Jacob Schum is -- years old.