Just as a reminder, this guy is no longer part of our team!
Carlos Silva faced 821 batters as a Mariner. He, and his defense, and his park, managed to retire 546 of those, resulting in 182 innings pitched. For reference, that's just 18 more innings, nine per year, than Erik Bedard pitched while a Mariner. It's also 57 fewer innings than Felix Hernandez pitched. Last year alone.
79 strikeouts. That's 3.9 strikeouts per nine innings pitched, or put better, 9.6% of all batters faced. Among Major League starting pitches expected to toss at least 100 innings in 2009, a 9.6% strikeout rate would have been the second worst in all of baseball, a smidgen ahead of Jeremy Sowers. In 2008 it would have been third worst ahead of only Livan Hernandez and Kyle Kendrick.
While the league average swinging strike rate for starting pitchers hovers just below 8%, Carlos Silva had a combined 4.7% rate. That would have ranked fourth worst in 2008 and dead last in 2009.
41 walks combined between 2008 and 2009. That's 2.0 per nine, or 5.0% of batters faced. Due credit, that would have ranked 16th best in 2008 and 8th best in 2009.
25 home runs allowed during his Seattle stint comes to 1.24 per nine or just over 3% of batters faced, a slightly worse than average rate.
The league average for ground balls is just about 43%. Carlos Silva's 44% rate certainly did not do much to aid him while in Seattle.
A 6.05 tRA is over a run worse than league average. Carlos Silva was about as bad as Zack Greinke was good in 2008 or CC Sabathia in 2009. Silva was on the same level as 2008-era Paul Byrd or 2009s Livan Hernandez.
Add it all up and by tRA's measurements you have a pitcher that totaled 0.4 wins below replacement during his tenure with the Mariners. And to top it off, he spent 147 days on the disabled list.