The Toronto Maple Leafs pushed to sign forward Andreas Johnsson to a contract extension last week, ​​​​​TSN's Darren Dreger reports.

Johnsson's camp prefers to wait on an extension, Dreger adds.

The 24-year-old entered Wednesday's action with 17 goals - second among all NHL rookies - and 17 assists in 55 games while averaging less than 13 minutes per night.

A seventh-round pick of the Maple Leafs in 2013, he ranks 13th in the league in goals per 60 minutes at five-on-five, according to Natural Stat Trick.

Johnsson is one of three key pending restricted free agents the cap-strapped Maple Leafs will try to retain this summer, along with Mitch Marner and Kasperi Kapanen.

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