From 2010 to 2013, Hollis played with Hungarian club
Albacomp. In the 2012–13 season, Hollis won the
Hungarian Championship and the
Hungarian Cup with Bericap Alba Fehérvár (the new name of Albacomp Fehérvár). In August 2013, Hollis signed a one-year deal with
Angelico Biella. In July 2014, Hollis signed with
Pallacanestro Cantù for the 2014–15 season. On March 23, 2015, he parted ways with Cantù and signed with
Rethymno Aegean for the rest of the
2014–15 Greek Basket League season. On August 5, 2015, Hollis signed with
Basket Brescia Leonessa of the Italian
Serie A2 Basket. On July 24, 2016, Hollis joined Portuguese club
S.L. Benfica in the
Liga Portuguesa de Basquetebol. On August 2, 2017, Hollis signed with Italian club
Pallacanestro Varese for the 2017–18 season. On January 26, 2018, he parted ways with Varese after averaging 6.8 points per game in
LBA. The same day, he signed with Bergamo for the rest of the
2017–18 Serie A2 Basket season. He signed with
Benfica in July 2019. He averaged 10.2 points and 4.4 rebounds per game. On July 30, 2020, Hollis signed with
Agribertocchi Orzinuovi of the
Serie A2 Basket. On January 4, 2023, Hollis signed with the Angolan club
Petro de Luanda of the
Angolan Basketball League and the
Basketball Africa League (BAL). In March 2023, he won the
Angolan Cup with Petro. Hollis joined the
Astros de Jalisco of the
Circuito de Baloncesto de la Costa del Pacífico (CIBACOPA) ahead of the
2024 CIBACOPA season. ==National team career==