Watch the first Test between New Zealand and Windies, live on Sky Sports Cricket (channel 404) from 9.55pm on Thursday on Sky Sports Cricket.
"He likes to use the pace of the ball so he prefers playing here to playing in the Caribbean", Radford told reporters ahead of the first Test starting in Wellington on Friday.
"So we've had four Test wins in the last four series".
A veteran of 42 Tests - the most by anyone in the current side - Roach was their best bowler on the three-Test tour of England with 11 wickets, and still managed to bowl impressively on the flat, slow tracks in Zimbabwe earlier this month when he picked up six wickets in two Tests there.
Worker, who has not appeared for New Zealand in Tests, has notched up 737 runs at an average of 49.13 in nine first-class matches he played this year. He has not yet represented New Zealand in Tests, but has played six limited-overs global matches.
The West Indies will determine their XI at the toss.
New Zealanders will also get their first close look at promising 24-year-old Shai Hope, whose two centuries at Leeds drove his side to a surprise win over England in August.
"We did think about it".
New Zealand's last test was in Hamilton in March; since then the West Indies have played eight tests while New Zealand's sole focus has been short form cricket.
Black Caps captain Kane Williamson is New Zealand's highest runscorer in 2017 with 468 which now ranks him 29th in the world with just seven innings to his name.
Uncapped wicketkeeper Tom Blundell is also set to make his debut after he was added to the squad as BJ Watling's replacement.
Radford said that second innings performance was disappointing, where some batsmen could have pushed for a Test spot.