Sheffield United are planning to send Andy Butler back out on loan after seeing an agreement with Walsall collapse.
Nottingham Forest are looking for an 'impact' player on loan, but are still refusing to comment on Jack Grealish links.
The Spanish club have confirmed the Nigerian striker has parted company with them after the exit fee in his contract was paid via the league on Monday.
"Footballer Obafemi Martins has this afternoon placed at the headquarters of the Professional Football League (LFP) the amount corresponding to the termination clause in his contract with Levante UD," said a Levante statement.
That release fee is reportedly in the region of three million euros.
Martins scored nine goals in 27 appearances for Levante since joining from Rubin Kazan in the summer.
The well-travelled 28-year-old former Inter Milan and Newcastle striker is now expected to fly to the United States to complete his move to the Sounders, who would become his eighth club.