Yesterday, Livan Hernandez pitched a pretty good game. He started out a little shaky, but settled down, and ended up retiring 16 of the last 17 batters he faced. He also managed to go 6 innings, while only allowing 2 ER. This falls into the category of a quality start, which, as you know, required 6 IP or more, and 3 ER or less. Normally I don’t pay attention to this number, because it doesn’t always indicate an actual good performance. But with Livo, it’s a little different.
Last year, Livo made quality starts in 67% of his games started. That was his highest percentage since 2003, and his first year of 60% since 2005. The years in between he approached 60% at times – in 2007 and 2009 he was at 58%. But in those years his ERA was not impressive, never having an ERA+ of even 100. In fact, since his rookie season, he’s only had 5 seasons with an ERA+ of 100 or better. In 4 of those 5 seasons, his QS percentage was over 60%. Only in 2004, when he had an ERA+ of 126 did he have a QS percentage as low as 57%. Fittingly, those 4 seasons of great ERA+ were the only time his QS percentage was above 60% in his career.