The deal is contingent on Rodriguez taking a physical, the catcher said in an interview Monday on ESPN, adding that "finally, you know, [a deal is] very close." Rodriguez said there was interest from several teams, but the Astros were the team that showed the most interest.
Rodriguez can make an additional $1.5 million in performance bonuses.
ESPN's Steve Phillips first reported the deal.
At the World Baseball Classic, Rodriguez, a 14-time major league All-Star, is hitting .600 (9-for-15) in four games for Puerto Rico.
Rodriguez hit .276 with seven homers and 35 RBIs in 115 games with the Detroit Tigers and New York Yankees last year. He is the only player in baseball history with at least 13 Gold Gloves and a career .300 average or better.
He has three more Gold Gloves, earning one as recently as 2007, than Hall of Famer Johnny Bench and almost double the total of Bob Boone, who is third on the list. Among position players, only Hall of Fame third baseman Brooks Robinson has more Gold Glove awards.
Rodriguez has caught 2,173 games, trailing only Carlton Fisk (2,226) and Boone (2,225) in terms of longevity behind the plate.
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