Yorkshire, who are becoming known as "Byas's Babes" because of the youthfulness of some of their recent players, blood two more youngsters in the four-day match against Zimbabwe which starts at Headingley tomorrow.

Reserve wicketkeeper, Simon Guy, 21, from Rotherham gets his chance because Richard Blakey takes the opportunity to rest his cracked finger, and left-hander Michael Lumb plays because England all-rounder Craig White is still unfit with a hamstring strain.

Lumb, 20, was born in Johannesburg and is the son of former Yorkshire opener Richard Lumb who played for the county between 1970-84, scoring over 11,000 runs and featuring in 29 century partnerships with Geoff Boycott.

Richard and his South African wife, Sue, now live in Johannesburg and Michael was born there while his father was playing club cricket during the English winter, the family returning home a few days later.

Michael, who has played for South Africa Under 19s, was taken on by Yorkshire last season and will be eligible to play Championship cricket for them from next year.

Skipper David Byas said: "Michael has made runs in the second team and deserves to step up to see what first class cricket is like. It will also be an ideal opportunity for us to run the rule over him at senior level before next season."

With Darren Gough and Darren Lehmann resting and White, Chris Silverwood, Michael Vaughan, Anthony McGrath and Ryan Sidebottom all still not fully match fit, Yorkshire are putting out their strongest possible team.

"I am very glad that we have got this fixture because we have shown in previous years that a week's break is of no use to us at all," said Byas.

"The game will benefit everyone and keep us involved and it will certainly be no tea-party because Zimbabwe will be desperate to come back strongly after their heavy defeat in the first Test."

Byas is delighted that Yorkshire have now zoomed to the top of both the Championship and National League tables and he paid tribute to Lehmann's batting skills and the excellent performances of youngsters like 19-year-old batsman Vic Craven and 17-year-old seamer Gary Ramsden, both of whom have had an unexpected taste of first team cricket because of injuries to others.

"We have hardly played any cricket so far this season and to have half-a-dozen or so on the injury list at this stage is quite astonishing, I have never known anything like it," said Byas.

"Those we have drafted in have been prepared to stand up and be counted and I will support that type of player through thick and thin."

Yorkshire (v Zimbabwe): Byas, Craven, Harden, Wood, Lumb, Fellows, Hamilton, Middlebrook, Guy, Hoggard, Hutchison.