The home team, in purple shirts started off brightly as they maintained the Blades strike force for early parts of the game.
New signing Parkinson moved upfront as Neil Warnock's barmy army fielded a 4-3-3 formation, just 5th minute into game United almost took the lead. Tonge, one-on-one with keeper struck keepers legs and Jagielka's follow up was deflected for a corner.
However ANDY PARKINSON was more successful moments later,
Tonge's world beating defence splitting pass Parkinson took the ball in his stride before Cooley finishing past the keeper.
A minute after restart the home side almost equalised, Kozluk missed headed back to Kenny but with the goal gaping Doncaster's shot drifted wide of the post.
Defender Chris Armstrong put in a beautiful ball for Paul Peschsiolido but the Canadian couldn't finish after Tavistock keeper Meeds got into a good position.
The pint-sized striker seized an opportunity when Wayne 'The Chief' Allison provided a knockdown but his volley just went wide of the target.
The debutant Chris Morgan was superb in defence and could have got on the score sheet but header flashed over the top of the bar.
Tonge flashed a shot at the keeper just before half-time as the Blades went in with a 1-0 advantage.
At half-time Neil 'The Messiah' Warnock made two changes at half-time and one substitute capitalised, Mike Whitlow made a surging run into the box but was brought down but striker CARL ASABA stepped up and finished to score Blades second goal.
Tavistock, despite losing tried their hardest but chances still fell to away side. Asaba and Parkinson couldn't slip ball past Meeds, England Under 21 International Michael Tonge blasted over bar and
then both Asaba and Tnge lost out to Meeds.
Jack Lester, who was now on pitch has scored in every friendly he has played in and it was not long before he continued that run, on 75th minute LESTER slammed ball home to make it 3-0 and made it 4-0 when LESTER chipped the keeper.
Former Scottish International Stuart McCall tried a carbon copy of Lester's 2nd goal but he goal tally from last season has his ball floated over bar in last minute of play.
Sheffield United: Kenny, Kozluk (Cryan h-t), Jagielka, Morgan, Whitlow, Tonge, McCall, Armstrong (Montgomery 58), Peschisolido (Whitling* 78), Allison (Asaba h-t), Parkinson (Lester h-t).
* Michael Whitling, a friend of Neil Warnock made an appearance as a guest player.