Waller took the long path to NFL stardom, with his breakout performance occurring four days before he turned 27 in Week 1 last year. He doubled his career receiving yardage by Week 3, eventually finishing the season top 3 among tight ends in catches and yards. Waller also tied for second among tight ends in YPT (9.8), while he was sixth in YAC average (6.6) and second in broken tackles (eight). Four years earlier, the sixth-round pick had entered the NFL as an oversized wide receiver before transitioning to tight end in his second season with the Ravens, but he never had much of a chance to develop at the position while serving suspensions for substance abuse violations. Waller has been open about his struggle, pointing to a sober, healthy lifestyle as the spark that eventually led to on-field success. Clearly impressed, the Raiders signed him to a four-year, $29.8 million extension in October, though they also went shopping for depth in the offseason with Jason Witten coming in on a one-year contract. While there's no doubt Waller will be the team's top receiving threat at tight end, he could see his snaps scaled back from last year's 90.3 percent share, with any decrease potentially impacting his target volume. There is also some incoming target competition from other positions, after the Raiders selected Henry Ruggs, Lynn Bowden and Bryan Edwards within the first three rounds of the 2020 draft. The good news is that Waller has shown enough talent and polish to survive as a fantasy asset even if his volume dips.