COUNTY CHAMPIONSHIP DIVISION ONE, Old Trafford: CLOSE OF PLAY, DAY ONE: Yorkshire 181, Lancashire 106-0 (Lancs 3pts, Yorks 0pts) 31 July - 3 August 2009
Smith's previous best figures in an innings were 4-57
Tom Smith took career-best figures of 6-46 as Lancashire totally dominated day one of their Championship match with Yorkshire at Old Trafford.
Smith was backed up by Sajid Mahmood (3-57) and Kyle Hogg (1-23) as the visitors were all out for 181.
Andrew Gale's 54 the only bright spot for Yorkshire, who are without a Championship victory all season.
In reply, Lancashire closed on 106-0, with Smith scoring an unbeaten 40, and Paul Horton 61 not out.
Aided by a little bit of movement and some very bad Yorkshire batting, Smith claimed the wickets of Anthony McGrath, Joe Sayers , Jonny Bairstow, Gerard Brophy, Tim Bresnan and Rich Pyrah.
Smith, who had only claimed three Championship wickets all season prior to this fixture, took his six wickets in 13 consecutive overs.
Yorkshire's worst period came straight after lunch when they lost five wickets for 31 runs in 10 overs to slump from 91-3 to 122-8.
Tailender Ajmal Shahzad hit four boundaries in a useful unbeaten 26 off 42 balls to push Yorkshire past 150.
Although there was a little bit of help for the bowlers it is generally a good pitch to bat on.
Horton and Smith demonstrated that as they shared their side's best opening partnership of the Championship season.
Horton reached his fourth fifty of the season off 78 balls with seven fours before bad light forced the players off the field seven overs early.
Lancashire all-rounder Tom Smith told BBC Radio Lancashire:
"It's been a pretty good day for the team and fortunately I had a good day as well.
"I thought we bowled well early on and then to blow them away in the middle session and cap it off with a century stand was a great day.
"After the lottery of the Twenty20 bowl-out, we're giving our all to the Championship and the Pro40."