McCall has been linked with a return to Bramall Lane having led Motherwell to second in the Scottish Premier League table and a Scottish Cup final, but he insists that he is happy at the Scottish club.
"I think it only comes from the fact I had five great years at Sheffield United," McCall told ESPN.
"It's a smashing club but I'm certainly enjoying my time at Motherwell.
"They are in the playoffs and they have got a great chance of getting up and hopefully they do."
McCall, who recently signed a new two-year contract at Motherwell, played for Sheffield United between 2002 and 2005.