The Rams have completed their third loan signing in as many days with the capture of Coventry City striker Stern John.
Trinidad and Tobago international John, 28, joins for three months under the 93-day rule which allows clubs to sign players on loan outside the transfer window.
He will be with Derby until the middle of December when he will return to the Ricoh Arena, as any permanent transfer cannot be completed until the next window opens in January.
John made his name in English football with Nottingham Forest, who he joined in November 1999 for a fee of £1.5m from American MLS side Columbus Crew.
He netted 18 times for the Reds but with his contract running out he joined Birmingham City in February 2002, and helped his new employers to the Premiership at the end of that campaign.
John failed to nail down a regular place in the top-flight under Steve Bruce and made the move to the Sky Blues in September 2004 for a fee of £200,000.
He scored 12 goals last season as Coventry successfully fought against relegation, and netted twice against Derby in April's last-ever game at Highfield Road.
He has also scored on his debut for every English club he has played for.