Ravens coach John Harbaugh has been nearly perfect at challenging plays this season, winning five of six challenges – including two in Monday night’s 12-7 loss to the Jacksonville Jaguars.

During his weekly news conference Tuesday, Harbaugh shared what went into the process of succeeding at challenges.

“Well, sometimes it depends on what you chose to challenge,” he said. “This year, the way it’s turned out is that the things we’ve chosen to challenge have been critical-type plays that we’ve had pretty clear looks at, for the most part. The one that we didn’t have a clear look at we lost. We kind of guessed at it a little bit. [Head coach’s assistant] Matt Weiss is the guy that does that for us up in the box. He does a great job. He studies his challenge rules like nobody I’ve ever seen. He understands that as well as anybody I’ve been around, and he does a great job in the box with that. He’s got young eyes, and he’s been doing a good job.”