Commissioner Gary Bettman at the NHL general managers meeting this spring had a clear answer for when the league might be able to use tracking technology to determine a variety of things with certainty, from high-sticking to whether a puck fully crossed the goal line.

"When we're certain that it works," Bettman said at the time. "We will test it and re-test it, but we haven't hesitated to spend the money or the time on technology to improve the game."

The NHL is taking another step in that innovation with the expansion of the use of Hawk-Eye measuring and tracking technology as part of a new technology partnership with Sony announced Wednesday, hours before the start of the Stanley Cup Final.

The same technology that has become omnipresent in tennis to determine whether the ball is in o

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