John Sutton got both goals for Well at the Global Energy Stadium as they consolidated fifth place in the Scottish Premiership.
Sutton struck twice in the first half hour as the visitors dominated, but a spirited second-half showing from County saw them reduce the deficit through Melvin De Leeuw.
Despite the hosts pushing hard for a leveller, Motherwell - beaten 5-0 by Celtic in their last league outing - held on for all three points.
McCall admitted they had been made to work hard for their victory although he felt their first-half performance warranted the three points.
"We controlled large parts of the first half and but for a really good save from their keeper would have gone in 3-0 up at half-time.
"Derek (Adams, Ross County manager) changed his 4-1-4-1 formation once we went 2-0 up and you're never going to get an easy ride of it up here.
"They threw everything at us second half. It was probably a tale of two halves and the first-half performance got us the victory.
"I wouldn't say we were lucky, more hard-fought and we stuck in there when we needed to."
He added: "I thought our young keeper did well in difficult circumstances.
"When you get into a 2-0 lead you need to try and kill the game off but they had a real go.
"There's all different ways to win and that was gutsy and I'm delighted to get back on the winning track.
"They've lost three on the bounce which has probably never happened to them so it was always going to be a tough game."