Umar joined Turkish club Samsunspor from Wikki Tourists in the 2013 summer transfer season at age 18.[5] He scored four league goals in his first season and established himself as the club's preferred striker in place of his compatriot Ekigho Ehiosun.[6][7] Umar had his contract terminated after three months without pay.[8]
Osmanslıspor
On 10 January 2015, Umar joined promotion-seeker rival Osmanslıspor on a free transfer, signing a 3.5 years contract.[9] In the 2016–17 season, he made his debut in continental competition on 21 July 2016, scoring a hattrick against Moldovan side Zimbru during the Europa League qualifiers.[10] Osmanlıspor made it to the group stage of the competition, where Umar netted a goal in the first match against FCSB in a 2–0 victory.[11]
Loan to Rizespor
On 27 July 2018, Umar joined recently promoted club Çaykur Rizespor on a one-year loan.[12]
Rizespor
On 4 September 2019, Umar permanently joined Çaykur Rizespor after helping them avoid relegation, signing a three-year contract.[13] He had an anterior cruciate ligament injury that sidelined him for the 2020–21 season.[14]
Bodrumspor
On 12 January 2023, second division side Bodrumspor announced the signing of Umar on a free transfer, until the end of the season.[15]
Tuzlaspor
On 15 September 2023, Umar joined Tuzlaspor on a free transfer.[16]
International career
Umar has played for the Nigeria national under-20 football team. He was the leading scorer in the 2013 African youth championship with four goals and scored twice at the 2013 FIFA U-20 World Cup finals in Turkey.[17] He was selected by Nigeria for their 35-man provisional squad for the 2016 Summer Olympics.[18] Umar scored the second goal against Denmark that send Nigeria to the semi-final of Rio 2016 Olympic games.