While Bruce Bochy has explicitly stated that Melky Cabrera will not be utilized in San Francisco's postseason play, there has been no such declaration made against the other player suspended this season for a positive PED test.
Guillermo Mota, back from a 100-game suspension, has served San Francisco well as an innings-eater and mid-game bridge between a struggling starter and the late-inning reliever corps of Javier Lopez, Sergio Romo, Jose Mijares, Jeremy Affeldt and Santiago Casilla. Add in Ryan Vogelsong, and you've got one spot for either Mota or George Kontos.
In 42 appearances this season, Kontos has pitched to a 2.55 ERA with 42 strikeouts and 12 earned runs. Those numbers are solid, to be sure.
The only thing standing in Kontos' way are the same troubles facing Brett Pill: the value Bruce Bochy places on experience.
Mota pitched (albeit not much) in the 2010 postseason. George Kontos is finishing his first real season as a big-leaguer. Now, plenty of fresh players aren't punished for being new on the scene—no one minded that Buster Posey was a rookie two years ago.
Unfortunately, Kontos hasn't been so lights out as to warrant automatic inclusion on the postseason roster. And with Lopez, Romo, Mijares, Affeldt and Casilla all locks for the playoffs, it appears that Mota will be given a shot at a redemption at the cost of Kontos' postseason.