SB Nation User Blog: raysrule07

Mark Teahen

raysrule07 — Sun, 13 Jan 2008 19:23:56 -0000

Hello everyone, as you can probably tell from my username, I'm a Rays fan(though I am from Kansas).

Anyways, the Rays need a player who can play 3B, 1B, and some OF, and preferably someone who hits left-handed. Mark Teahen fits this profile perfectly. I'm not very good at gauging the value of players on other teams, so I thought I'd ask you guys what you think the Royals plans are for Teahen, and what kind of value they would be looking for in return if they were to trade him, and what areas the team would be looking to address in making trades.

Thanks in advance.

Instrucional League

raysrule07 — Sat, 01 Sep 2007 04:32:35 -0000

Marc Lancaster has released the Instructional League rosters, here, http://www.tboblogs.com/index.php/sports/related/C142/

Pitchers(19)
Wade Davis, Montgomery
James Houser, Montgomery
Jacob McGee, Montgomery
Chuck Tiffany, Montgomery(DL)
Josh Butler, Vero Beach
Greg Dupas, Vero Beach
Matt Walker, Vero Beach
Jeremy Hellickson, Columbus
Will Kline, Columbus
David Price, Columbus
Alex Cobb, Hudson Valley
Kyle Ayers, Princeton
Nick Barnese, Princeton
Kevin Chavez, Princeton
Joseph Cruz, Princeton
Tyree Hayes, Princeton
Chris Luck, Princeton
Matt Moore, Princeton
Michael Southern, Princeton

Catchers(5)
Christian Lopez, Vero Beach
Nevin Ashley, Columbus
Mike McCormick, Hudson Valley
Mark Thomas, Princeton
Tomas Francisco, Dominican Summer League

Infielders(8)
Henry Wrigley, 1B, Hudson Valley
Cody Cipriano, 2B, Hudson Valley
Michael Ross, 2B, Princeton
Reid Fronk, 3B, Hudson Valley
Omar Luna, SS/3B, Hudson Valley
Shawn O'Malley, SS, Hudson Valley
Robi Estrada, SS, Princeton
JT Hall, IF, Vero Beach

Outfielders(7)
Sergio Pedroza, RF, Vero Beach
Ryan Royster, LF, Columbus
Desmond Jennings, CF, Columbus
Emeel Salem, CF, Hudson Valley
Dustin Biell, CF, Princeton
David Jones, OF, Princeton
Justin Reynolds, OF, Princeton

Special Thanks to Kevin Gengler for posting this on RaysBB.com

ProSLG

raysrule07 — Mon, 20 Aug 2007 22:28:53 -0000

For those of you who read raysbb.com(formerly raysbaseball.com), you'll notice the stat IsoSLG(or IsoP)used often to measure a player's power, especially for prospects.

IsoSLG is supposed to isolate SLG % from BA in order to more accurately depict a player's power independent from their contact abilities. However, I think it hurts players who have lower batting averages, because it implies a linear relationship between SLG and BA, when the relationship is more proportional. Take the following (fictional) example statline:

500 AB, 100 H, 20 2B, 5 3B, 15 HR, 175 TB, .200 AVG, .350 SLG, .150 IsoSLG

Now, if this same player were to have 40 more hits to raise his average to .280, using IsoSLG, you would predict that his SLG would rise the same amount, to .430. However, this is only true if all 40 additional hits the player would have hit would have been singles, adding 40 total bases. Using the percentage of each extra base hit(2B-20%, 3B-5%, HR-15%), over 40 AB's, he would have hit 24 singles, 8 doubles, 2 triples, and 6 home runs, for an increase of 70 total bases, to 245, making his SLG % .490, and his IsoSLG .210.

As you can see, the relationship between batting average and slugging percentage is proportional, not linear. I believe a more accurate representation of a players power would be a proportional number found by dividing SLG by AVG. For instance, in the example above, the player's IsoSLG for the first line was .150, and his proportional slugging(or ProSLG) was 1.750. For the second stat line, his IsoSLG was .210, and his ProSLG was 1.750, the same as the first stat line.

There are of course, flaws, such as if a player has a low BABIP, using ProSLG to predict a SLG should the BABIP return to normal levels would be inaccurate, as the number of home runs would not have increased, etc.

The 5 leaders in the D-Rays organization are as follows:

Player        Age    Level ProP    IsoP
M. Fields    22    A 1.927    .227
D. Mohr        31    AAA 1.913    .209
Q. Stewart    24    A 1.871    .229
S. Pedroza    23    A-Adv 1.861    .247
R. Royster    21    A 1.785    .255

and others of interest
E. Longoria    21 AA/AAA 1.747    .224
J. Pridie    24    AA/AAA 1.622        .184
J. Ruggiano    25    AAA 1.633    .193
R. Brignac    21    AA 1.675    .172
D. Jennings    21    A 1.476    .150
J. Jaso        24    AA 1.502    .158
R. Hughes    24    A-Adv/AA 1.559    .181
F. Perez    24    AA 1.570    .171