The 32-year-old is feeling relaxed and confident heading into his second Boston Marathon.
Two-time defending champions Chris Mocko and Elle Pishny finish third and second, respectively.
The pair leads a strong contingent of runners that will compete in the race's 119th edition on April 20.
Fernando Cabada and Lindsey Sherf were the top Americans.
It was a fast day in San Jose!
The 27-year-old was tuning up for the ING New York City Marathon.
Mattie Suver is the women's champion.
The 27-year-old Kenyan ran the fastest half-marathon time on a record-eligible course in the U.S. this year.
Dani Fischer wins the women's race at the XSport Fitness Rock 'n' Roll Chicago Half Marathon presented by HumanaVitality.