Winger Holland, 23, made four first-team appearances, featuring as a substitute against Wolverhampton Wanderers and Arsenal in the Premier League in December 2019 and twice in the EFL Cup. He has also made more than 50 senior appearances during two loan spells at Oxford United.
Midfielder Rosa, 21, featured once in the first-team squad as an unused substitute for the Premier League fixture at Sheffield United in January 2020. He played 65 games for the development squad, including eleven times in the EFL Trophy.
Left-back Fevrier, 19, became West Ham's youngest-ever reserve-team player when he appeared against Leicester City at 15 years, six months and 12 days in October 2018, breaking a record previously set by Noble in 2003.
Winger Diallo, also 19, played 25 times for the development squad, scoring five goals, including one appearance in the EFL Trophy at Colchester United in September last year.
Midfielder Ashley, 22, joined the Hammers from AFC Wimbledon in 2020 and has since made 14 appearances for the development squad.
Left-back Evans departs having made 19 U18 Premier League appearances over the previous two seasons.
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