For the second time, the Broncos have a Mr. Irrelevant. The Broncos on Saturday selected Buffalo linebacker Red Murdock with the No. 257 and last pick in the NFL draft in Pittsburgh. As the final player chosen, he is in line to be honored in a fun-filled week. The first Mr. Irrelevant was selected in 1976. The only previous time the Broncos had one was quarterback Chad Kelly going last in the 2017 draft. “I feel extremely grateful and excited to get ready to help the Broncos win,’’ Murdock said. “I know a little bit about Mr. Irrelevant but the main thing is I got an opportunity and I’m trying to make the most out of it and help us win.” Murdock set a college record with 17 forced fumbles in his Buffalo career. Many analysts had projected him to be taken around the fifth round. Since the start of Mr. Irrelevant in 1976, the event has been celebrated in Newport Beach, Calif., outside Los Angeles.…