In what could be devastating news for the rookie, Cardinals running back Ryan Williams “probably” has a torn patellar tendon according to head coach Ken Whisenhunt.

From Rotoworld:

It’s a season-ending and potentially career-threatening injury depending on Williams’ recovery process. The good news is that Williams is still just 21 years old, and the injury is occurring now as opposed to November. He’ll have a better chance to be healthy by the start of 2012 training camp. The bad news is that Williams will need major knee surgery and his rookie season in the NFL will be a washout. Beanie Wells will dominate carries in Arizona this year.

This poor kid can’t catch a break. After breaking multiple Virginia Tech and ACC rushing records in 2009 (including VA Tech’s single season rushing yards record, the ACC single season rushing touchdown mark and the ACC single season TD record), Williams injured his right hamstring in a game against East Carolina and wound up missing four games in 2010. Now he faces an even bigger injury hurdle.

Those we kept an eye on him in training camp were impressed by his quickness and ability to change directions without throttling down his speed. Given Beanie Wells’ injury concerns and inconsistently woes, Williams figured to see plenty of playing time in 2011. Hopefully he’ll only miss his rookie season and will be back in training camp again next year.

That now makes two players from the running back class of 2011 that will miss this season due to injury. The Lions’ Mikel Leshoure tore his Achilles’ tendon in practice last week.