Lamb featured in every Lancashire Lightning game as they finished runners-up last year. He took three wickets on a Finals Day where they lost by a single run to Hampshire in the final
Danny Lamb has joined Gloucestershire on a short-term loan.
The Lancashire all-rounder has moved south on an initial 14-day loan and will be available immediately.
The 27-year-old could feature in Gloucestershire's T20 Blast clash with Essex Eagles in Chelmsford on Tuesday (May 30).
Lamb featured in every Lancashire Lightning game as they finished runners-up last year. He took three wickets on a Finals Day where they lost by a single run to Hampshire in the final.

Having taken 41 matches in 52 T20 matches so far, the Englishman could be a useful addition to a team that has won only once in their first three Blast fixtures.
Gloucestershire have been hampered by a series of injuries over recent weeks and the addition of Lamb will offer the side another option.
Steve Snell, performance director at Gloucestershire, said: "Danny is a player we've been tracking for a period of time and with a few injuries around, particularly in the bowling allrounder spot, Danny will enhance our squad and the competition for places in that area.
The right-hander has an unexceptional T20 record, averaging 27.53 with the ball and 12.77 at a strike rate of 103.13 with the bat.

The West Country side will also benefit from Lamb being available for their next County Championship fixture against Leicestershire (from June 11).
With Gloucestershire facing a condensed schedule, the cover Lamb provides is vital.
Snell added: "The turnaround between games in this competition is so tight, and player recovery is limited, meaning that the utilisation of a quality squad of players on the field is essential.
"I appreciate the flexibility of Lancashire to make this happen so swiftly and it's a great opportunity for Danny to play some first-team cricket and further showcase what he can do."