Scott Kazmir
This man still isn't even 30. (Getty Images)

Indians starting pitcher Scott Kazmir threw for a collection of scouts Wednesday, per Hardball Talk. In game action this spring so far, Kazmir has thrown four shutout innings while striking out four, walking zero and allowing only two hits.

And while this is 100 percent considered a "comeback attempt," Kazmir's age is worth noting. He turned 29 in January, which means he's right in the area that should be the middle of his prime.

Remember, this is a two-time All-Star who led the American League in strikeouts in 2007 when he was only 23. He appeared to have long-lasting ace potential until he fell apart from 2009-11, culminating with a 17.02 ERA in five starts for Triple-A Salt Lake in 2011. His major issue was control, as Kazmir walked 20 hitters in 15 1/3 innings during that short Triple-A stint. The four spring innings this year are far too small a sample to reach any firm conclusion, but the zero walks so far are a great sign.

Kazmir also battled shoulder fatigue and decreased velocity in 2010 and 2011, but reports this spring have him sitting in the low-90s with his fastball. His career average fastball velocity is 92.18 miles per hour, per BrooksBaseball.net.

Moving forward, Kazmir's command and velocity should be heavily monitored, sure, but it sounds like signs so far are all positive.

Considering his upside and still relatively young age, Kazmir's comeback is absolutely one of the most intriguing storylines to watch this spring. After playing for the Sugarland Skeeters last season in independent ball, it's possible he'll be with the Cleveland Indians in 2013. What an incredible story that would be.

For more baseball news, rumors and analysis, follow @EyeOnBaseball on Twitter, subscribe to the RSS feed and "like" us on Facebook. Also, individually interact with us on Twitter: @MattSnyder27, @daynperry and @mikeaxisa.