The Seattle Mariners are thrilled to have signed right-hander Marco Gonzales, who will likely become one of the league’s best starting pitchers. Gonzales, 28, will turn 29 on February 16 and will have played three seasons for the team by then. The four-year extension, worth $30 million, buys out the remaining three years of arbitration and his first year of free-agent eligibility. He also has an option for another five seasons, which could earn him up to $45 million.