The Mets bolstered their catching depth by signing longtime Dodgers backstop Austin Barnes to a minor-league deal, the team announced on Thursday afternoon. He’s back with the Mets for a third straight year after appearing in 92 games with New York last season. Starter Francisco Alvarez and Hayden Senger are the only other catchers on the Mets’ 40-man roster heading into spring training. He’s a two-time World Series champion he and appeared in postseason games with the Dodgers in eight separate seasons with Los Angeles. Keeping Barnes’ career numbers and recent track record in mind, it’s hard to expect anything exemplary on offense from the 36-year-old this spring.