A long-term contract extension is in the works for the SeattleMariners that could be worth more than $400 million, according to sources.

Sources tell Jeff Passan that the new contract has player and team options.

Rodriguez became the first rookies to record 20 home runs and 20 stolen bases in the same season when he hit a solo shot in the eighth against the Washington Nationals. He is one of four rookies in American League history to do it.

The contract extension was reported by MLB.com.

Rodriguez was a member of the American League All-Star team in his first season, despite being runner-up in the Home Run Derby. He is batting.270 with 64 runs scored and a.799 OPS for the SeattleMariners, who are in third place in the American League.