Paez, 24, combined for a 4-1 record and 3.88 ERA with 55 strikeouts in 55 2/3 innings with Class A Advanced St. Lucie and Double-A Binghamton last season. He was selected by the Mets in the 38th round of the 2013 Draft out of Rio Hondo College in Whittier, Calif.
"Paez is a kid our scouts really liked," Mariners assistant general manager Jeff Kingston said. "He's a left-handed pitcher who throws strikes and can really spin a breaking ball. He's had a lot of success in the Minor Leagues and finished the year in Double-A last year."
Taylor, 23, hit .