Matsuzaka's contract was selected Wednesday from Las Vegas, and New York sent Lannan outright to the Triple-A team.
Matsuzaka, a 33-year-old right-hander, was 3-3 with a 4.42 ERA in seven starts for the Mets last year and 0-0 with a 2.25 ERA in two starts for Las Vegas this year.
Lannan, a 32-year-old left-hander, was 1-0 with a 15.25 ERA in five relief appearances for the Mets this year. He has the choice to refuse the outright assignment and elect to become a free agent.
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