PFF50: The 50 best players in the NFL right now, NFL News, Rankings and Statistics
PFF Rankings: 49ers atop the RB list in the NFL - Sactown Sports
George Kittle - Wikipedia
49ers' George Kittle is the NFL's highest-graded tight end, per PFF
Pro Football Focus: George Kittle is best player in NFL
49ers All-Pro George Kittle could get even better in 2020
Super Bowl LIV Preview: Is George Kittle the Best Player in the NFL?
San Francisco 49ers Sign George Kittle To Record-Setting Extension