German / Cuban winger Onel Hernandez signed for Norwich City on 25th January 2018 from German second tier side Eintracht Braunschweig on a three and a half year contract. City are reported to have paid £1.8million. He had played 53 times for Braunschweig, scoring six goals.

Hernández grew up in Gütersloh after having emigrated from Cuba to Germany with his mother and sister at the age of six. He played for junior side TuS Westfalia Neuenkirchen, FC Gütersloh 2000, Rot Weiss Ahlen (-2007), Arminia Bielefeld (2007-1/2010). In July 2012, he transferred to Werder Bremen's second string having played 28 games for Arminia Bielfield. 18 months and 45 games later, he moved to Wolfsburg's reserves before joining Braunschweig in 2016..

He played once for Germany at Under-18 level, in a match in 2010 against Ukraine.

He made his Norwich debut as a late substitute in the 1-0 home win over Middlesbrough on 3rd February 2018. He finished the season with 12 appearances.

Hernandez scored his first goals for Norwich in the 2-2 draw with Birmingham on the opening day of the 2018/19 season (4th August 2018). Both goals were equalisers to disappoint the St Andrews' faithful.

On 13th November 2018, Hernandez received his first call up to the Cuba national squad.

Hernandez made 43 appearances, scoring nine goals, in 2018/19 as Norwich won the Championship title and promotion to the Premier League. Onel won the hearts of Norwich fans with his confessed delight in shopping at Argos and playing the 2p machines at Hemsby.

He made a further 29 appearances for Norwich in 2019/20 scoring twice (becoming the first Cuban to score in the Premier League).

Onel made his international debut for Cuba on 25th March 2021in a World Cup 2022 qualifier against Guatemala. He then scored his first international goal in his second appearance, a 2-1 defeat to Curacao on 28th March.

Onel made 23 appearances, 16 as substitute, during 2020/21 as Norwich won the Championship title.

With City in the top lfight and investing in new players, Onel was loaned to Middlesbrough on a season long loan on 29th August 2021. Middlesbrough boss Neil Warnock said "He's just the type of player we've been looking for. I think he needs us as much as we need him, having not played an awful lot over the past year.He'll get plenty of opportunities here and I'm looking forward to working with him."

He made 18 appearances for Boro but after Chris WIlder replaced Warnock, these were mainly from the bench. On 14th January 2022, he ended his loan spell at Boro and signed instead for Birmingham City on loan. He made 22 appearances for Birmingham, scoring three goals.

He made 42 appearances in Norwich's disappoining 2022/23 Championship season, scoring twice. The following campaign Onel made a total of 35 appearances in 2023/24 as Norwich finished sixth reaching the Championship play-offs, before losing 4-0 to Leeds.