There were more sophomore successes in the NFL in 2018 than sophomore slumps.Kansas Citys Patrick Mahomes threw for 5,000 yards and 50 touchdowns, Carolinas Christian McCaffrey ran for 1,000 yards and added 867 receiving yards, and both Pittsburghs James Conner and Seattles Chris Carson had breakout rushing seasons after doing little during their rookie campaigns. Pittsburghs JuJu Smith-Schuster racked up 111 receptions for 1,426 yards and seven scores in his second NFL season and made All-[...]