The London Evening Standard says the deal is for around $7 million, and that Chalobah turned down a deal to stay at Chelsea despite earning a Premier League winners’ medal for Antonio Conte last season.
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The England youth international will finish his Chelsea career with just 15 appearances, all this season, despite joining the team’s youth set-up in 2005.
Chalobah, 22, had loan stints at Watford in addition to Burnley, Nottingham Forest, Middlesbrough, Reading, and most recently Napoli.
He’s the sort of prospect worth the cheap sum and the project of watching whether he’ll bloom firmly planted at one club.