''Go back a number of months and it could have been the end of his career. He's come back with a vengeance and wants to play well and play for the Black Caps."
Former test opener Edgar has seen him bat twice in Plunket Shield games and likes what he has seen.
He denied Boxing Day was a specific comeback target for Ryder.
''We weren't sure, but it was just a matter of his form and feeling comfortable with where he's at," he said.
Edgar is comfortable with the support that will be around Ryder - who has had troubled episodes involving alcohol in the past - within the team environment.
Martin Guptill is back after missing the last two tours to Bangladesh and Sri Lanka due to injury.
Seamer Tim Southee is missing from the first two games due to having treatment for an injury to a big toe next Tuesday.
He is expected to return for the third game in the series at Queenstown on New Years Day.
The New Zealand ODI squad for the five-game series against the West Indies, starting at Eden Park on Boxing Day:
Brendon McCullum (c), Martin Guptill, Jesse Ryder, Kane Williamson, Ross Taylor, Colin Munro, Corey Anderson, James Neesham, Luke Ronchi, Nathan McCullum, Kyle Mills, Mitchell McClenaghan, Adam Milne.