Phillips played four seasons at Western Michigan. Starting out as a wide receiver, Phillips caught 32 passes for 479 yards and three touchdowns as a freshman, while also rushing 3 times for 37 yards. He was converted to defensive back as a sophomore. In three years on defense, he recorded 127 tackles, 13 tackles for loss, 2 sacks, and 12 interceptions, which returned for 376 yards and 5 touchdowns. But his primary role was as a kick returner. He led the Mid-American Conference in kickoff return yards in 2014 and 2016, finishing with 130 kickoff returns for a school record 3,193 yards, which ranked 5th all time in NCAA history. He returned five kickoffs for touchdowns, while also returning 32 punts for 327 yards and another score.[1]
In Week 3 of the 2019 season, Phillips recorded his first career interception off Josh Allen in the 21–17 loss.[6] He was placed on injured reserve on September 26, 2019 with a knee injury.[7] He was designated for return from injured reserve on November 21, 2019, and began practicing with the team again.[8] He was activated on November 29, 2019 prior to Week 13.[9] Phillips intercepted a pass thrown by Ryan Fitzpatrick in a Week 16 overtime loss against the Miami Dolphins.[10] He recorded two interceptions during a win against the Cleveland Browns the following week.[11]
Phillips recorded his first interception of the 2020 season during a loss to the Browns in Week 7.[12] He was placed on injured reserve on November 14, 2020;[13] and was activated on December 9, 2020.[14]
On December 14, 2021, Phillips was placed on injured reserve.[15]
Las Vegas Raiders
Phillips signed a one-year contract with the Las Vegas Raiders on March 17, 2022.[16] He was released on August 30, 2022.[17]
Denver Broncos
On September 1, 2022, Phillips was signed by the Denver Broncos.[18] He was placed on injured reserve on December 20.[19]
Houston Texans
On May 4, 2023, Phillips signed with the Houston Texans.[20] He was released on August 25, 2023.[21]
On December 26, 2023, Phillips was signed to the Tennessee Titans practice squad.[23] He was not signed to a reserve/future contract and thus became a free agent when his contract expired at the end of the season.[24]