Hey kids: don’t swing a weighted bat in the on deck circle


Here’s an interesting article in the Wall Street Journal. It’s about some studies of hitters who use weighted bats or doughnuts on their bats in the on deck circle. Turns out that, contrary to conventional wisdom, using a weighted bat for practice hacks does not speed up one’s swing when one uses a naked bat in the batter’s box. In fact, it slows it down.

There are lots of caveats here. The sample size in the studies are small and they all involve college and high school players, not big leaguers. The results, however, are consistent with previous studies and they do make some intuitive sense. This is particularly the case with batting doughnuts, which add weight to a very concentrated portion of the bat, thereby changing the center of gravity and thus the swing mechanics of the hitter.

Whether this is applicable at large or to higher level hitters or not, I still find it kind of neat. I always like it when people scrutinize ingrained habits and ask whether or not that thing we’ve always done is, in fact, worth doing.

Jeff Samardzija to undergo MRI on right shoulder

Denis Poroy/Getty Images
1 Comment

Giants starter Jeff Samardzija will undergo an MRI on his ailing right shoulder, according to NBC Sports Bay Area. The right-hander struggled in a minor league game on Wednesday, surrendering a pair of home runs and hitting a batter. Overall this spring, Samardzija has given up 15 runs (13 earned) on 17 hits (six homers) and seven walks with seven strikeouts in 11 innings.

This may mean Samardzija won’t be ready for the start of the regular season. Derek Holland would likely replace Samardzija in the rotation. Holland had been competing for the No. 5 spot in the Giants’ rotation.

Samardzija led the National League in losses last season with 15, also posting a 4.42 ERA with a 205/32 K/BB ratio in a league-high 207 2/3 innings. Since becoming a starter, Samardzija has been able to avoid injury, making 32 or 33 starts in each of the last five seasons.