GAINESVILLE — Florida will have veteran tailback Montrell Johnson Jr. back in the lineup to challenge Miami’s talented defensive front when the Gators host the No. 19 Hurricanes Saturday in the Swamp. Johnson underwent minor knee surgery during the first week of fall camp, jeopardizing the start of his senior season. But the team’s leading rusher in 2022 and 2023 has been taking practice reps and sits atop the team’s depth chart released Wednesday. “He’s ready to go,” coach Billy Napier said. The Gators’ depth at tailback provides options, but the 5-foot-11 ¼ 216-pound Johnson offers superior experience and an impressive track record.