Notts County have brought in Middlesbrough defender Sam Stubbs on loan, while Branislav Pindroch and Kristian Dennis have both left Meadow Lane.
Stubbs, the 20-year-old son of former Bolton, Everton and Celtic defender Alan, joined Boro from Wigan on a two-and-half-year deal in July 2018 but is yet to make a first-team appearance for the Teessiders.
Dennis joined Notts for an undisclosed fee in the summer, after scoring 21 goals for relegated Chesterfield last season, but has scored just six in 29 games this season for the Magpies.
He has now been shipped out on loan to Grimsby Town for the rest of the season, with Craig Mackail-Smith having arrived on loan from Wycombe Wanderers.
As for Pindroch, he has played just five times for the club since joining in the summer of 2017 and has failed to make the number one shirt his own at Meadow Lane.
The first Slovakian to play for Notts has now been released from his contract amid an "exciting" opportunity elsewhere.