PITTSBURGH — The Pittsburgh Pirates have a big series against one of their main rivals and they'll stick by a catcher who could become a solution to one of their main problems. The Pirates will have Endy Rodríguez start a second straight game at catcher and he will also hit eighth, as they face off against the Philadelphia Phillies in the series opener at PNC Park on May 15. Rodríguez made his season debut a day prior in the series finale vs. the Colorado Rockies, where he hit a double, a two-run single with the bases-loaded and walked, while catching five different Pirates pitchers in the 7-2 win to win the series at PNC Park. It was a big game for the Pirates catcher, who is looking to prove he deserves a spot on the Pirates roster moving forward and will have another opportunity vs. the Phillies.…