He was the head coach from 2014 to 2020:
2014: 9-7, narrowly missed playoffs (they were 2-14 the previous season without him)
2015: 9-7, made the playoffs with Brian Hoyer at QB
2016: 9-7, made the playoffs with Brock Osweiler at QB
2017: 4-12, did not make the playoffs. This is the year Deshaun Watson was drafted; however, he tore his ACL prior to week 9
2018: 11-5, made the playoffs
2019: 10-6, made the playoffs
2020: 0-4, fired after 4 games (Hopkins was traded the offseason of 2020)
He only had Watson and Hopkins for 2 full seasons (2018 and 2019). Went 11-5 and 10-6 those years. He wasn't really given a good team at inception, they were 2-14 the year before he got there.