Before the season, the Giants weren’t expected to have one strength, but be average in almost every category. Instead, the strength of the Giants has been their offense. Offense heavily relies on hitting in the same inning, so runs per game can very much be different from the peripherals. San Francisco was projected to be in the middle of the pack offensively, but breakout seasons from Brandon Crawford, Joe Panik, and Matt Duffy have greatly improved their offense. They are tied for second in wRC+ (excluding pitchers) in the majors.
The Giants already have the most productive infield in the majors and they’re all homegrown.
Buster Posey is having his normal year being an elite hitter, fantastic pitch framer (fourth in RAA), and hasn’t had any serious injuries. The 28 year old leads all catchers in fWAR and is second in wRC+.
Brandon Belt has become a relatively high variance hitter even without hitting home runs. He has 21 doubles, strikeouts out at a high rate, and is extremely streaky. Overall, he’s been productive after missing over 100 games last year.
Joe Panik gave the Giants a spark last year when he was called up, but ended up being relatively league average, and was expected to regress a bit. But now half way through the year he is second in fWAR and wRC+ among major league second basemen. Wouldn’t be surprised if he is given an extension before the start of 2016.
After starting the year behind Casey McGehee, the 18th rounder Matt Duffy stole the third base job. He is eighth in fWAR among third basemen and third among rookies. He is replacing Pablo Sandoval more than anybody would’ve imagined and he’s hit eight home runs in 258 plate appearances after hitting 13 in the minors (1087 PA).
With a steady improvement every year since being called up, Brandon Crawford has finally put it all together. He is leading all major league shortstops in fWAR while continuing to play a great shortstop. The 28 year old could see an extension soon.
And now for the injury filled outfield.
Nori Aoki, before fracturing his fibula, was having a career year. He will likely be back by August and has already been a bargain. He is making $4MM in 2015 and the Giants hold an option for $5MM in 2016. Hunter Pence only has 76 plate appearances after fracturing his forearm in Spring Training and now has wrist tendonitis, but he’s been a huge loss. Gregor Blanco is also having a career year at the plate and continues bringing great value to the Giants. Angel Pagan and Justin Maxwell are both having terrible seasons at the plate possibly resulting in Maxwell being let go and Pagan losing his starting job.
Andrew Susac has been getting more playing time and has proved he can hit major league pitching. He will be playing almost every day with Belt needing to play the outfield.
Overall, these guys could regress, but then again they’ve been doing this with Pagan drastically underachieving and Pence being hurt. The club could still look to add depth, but they should focus on pitching at the deadline. They are four games back in the division and 2.5 out of the second wild card.