The Mets round out their squad as spring training is about to get under way, signing veteran Japanese lefthander Hisanori Takahashi, 1B Mike Jacobs and C Shawn Riggans to minor league contracts. Takahashi, unrelated to Ken Takahashi who pitched for New York last year, was 10-6 with a 2.94 ERA with the Yomiuri Giants in 2009; he joins Ryota Igarashi, who was signed earlier this off-season, on the Mets’ pitching staff.