Wednesday, July 30, 2008
Replacing Manny Ramirez with Jason Bay
Although it's not finalized yet, there are pretty strong rumors that Manny Ramirez is heading out of Boston in a series of trades that will end up with Jason Bay manning left field in Fenway. My first reaction was, great, Manny kills the Yankees, but realistically, if you look at the numbers, it's a fairly even swap, perhaps even a slight upgrade.First, here's how their offense compares, using their 2008 projections, their actual 2008 YTD performance, their revised projection for the rest of the season, and their final season totals.
| Ramirez,Manny | AB | R | H | 2B | 3B | HR | RBI | BB | SO | HP | SB | CS | AVG | OBP | SLG | BR/650 | pBRAA | pBRAR |
| Projection | 442 | 75 | 123 | 26 | 0 | 23 | 98 | 71 | 98 | 5 | 0 | 1 | .278 | .384 | .493 | 103 | 14.5 | 28.0 |
| YTD | 362 | 66 | 109 | 22 | 1 | 20 | 68 | 51 | 86 | 8 | 1 | 0 | .301 | .399 | .533 | 113 | 18.4 | 29.3 |
| Rest of Year | 181 | 31 | 52 | 11 | 0 | 10 | 39 | 27 | 42 | 3 | 0 | 0 | .286 | .388 | .516 | 108 | 7.6 | 13.1 |
| Year End Total | 543 | 97 | 161 | 33 | 1 | 30 | 107 | 78 | 128 | 11 | 1 | 0 | .296 | .395 | .527 | 111 | 26.0 | 42.4 |
| Bay,Jason | AB | R | H | 2B | 3B | HR | RBI | BB | SO | HP | SB | CS | AVG | OBP | SLG | BR/650 | pBRAA | pBRAR |
| Projection | 565 | 92 | 150 | 32 | 2 | 28 | 89 | 81 | 149 | 6 | 9 | 0 | .265 | .363 | .478 | 99 | 14.2 | 31.2 |
| YTD | 388 | 71 | 110 | 23 | 2 | 22 | 62 | 59 | 86 | 2 | 7 | 0 | .284 | .381 | .523 | 110 | 17.5 | 29.2 |
| Rest of Year | 194 | 34 | 54 | 12 | 1 | 10 | 34 | 28 | 48 | 2 | 3 | 0 | .277 | .376 | .508 | 106 | 7.5 | 13.3 |
| Year End Total | 582 | 105 | 164 | 35 | 3 | 32 | 96 | 87 | 134 | 4 | 10 | 0 | .281 | .379 | .518 | 109 | 24.9 | 42.4 |
BR/650: Batting runs by linear weights (not position-adjusted or compared to average)
pBRAA: Batting runs above average, position-adjusted
pBRAR: Batting runs above replacement, position-adjusted
Given the margin of error in these numbers, it's safe to say that those are basically equivalent projections. While Manny may seem like the scarier offensive player, it's because we've gotten used to the Manny that terrorized opposing pitchers during his peak. He's not that player any more, although still quite good. But 36 year old Manny is probably not significantly better than 29 year Jason Bay offensively, especially if you factor in the likelihood of better durability for Bay.
So the Red Sox get rid of a clubhouse issue and don't figure to lose much offensively because of it, although it's possible there will be an adjustment period for Bay that suppresses his value somewhat.
Then there's the defensive side of the equation.
| YEAR | LG | Tm | POS | Player Name | Age | GP | Inn | PM | CH | ZR | Diff | RS | RS/162 |
| 2005 | NL | Pit | LF | Jason Bay | 26 | 146 | 1186 | 261 | 304 | .859 | -2 | -2 | -2 |
| 2006 | NL | Pit | LF | Jason Bay | 27 | 157 | 1373 | 308 | 367 | .839 | -8 | -7 | -7 |
| 2007 | NL | Pit | LF | Jason Bay | 28 | 142 | 1237 | 264 | 319 | .828 | -13 | -11 | -12 |
| 2008 | NL | Pit | LF | Jason Bay | 29 | 104 | 912 | 171 | 212 | .807 | -12 | -10 | -16 |
| Total | 549 | 4708 | 1004 | 1202 | .835 | -35 | -30 | -9 | |||||
| Proj | 130 | 1129 | 235 | 284 | .828 | -11 | -9 | -12 | |||||
| YEAR | LG | Tm | POS | Player Name | Age | GP | Inn | PM | CH | ZR | Diff | RS | RS/162 |
| 2005 | AL | Bos | LF | Manny Ramirez | 33 | 149 | 1225 | 237 | 326 | .727 | -43 | -36 | -43 |
| 2006 | AL | Bos | LF | Manny Ramirez | 34 | 123 | 1031 | 172 | 248 | .694 | -39 | -32 | -45 |
| 2007 | AL | Bos | LF | Manny Ramirez | 35 | 120 | 995 | 179 | 251 | .713 | -37 | -31 | -45 |
| 2008 | AL | Bos | LF | Manny Ramirez | 36 | 65 | 528 | 94 | 127 | .740 | -14 | -11 | -31 |
| Total | 457 | 3779 | 682 | 952 | .716 | -133 | -110 | -42 | |||||
| Proj | 102 | 838 | 149 | 208 | .717 | -29 | -24 | -39 | |||||
| YEAR* | LG | Tm | POS | Player Name | Age | GP | Inn | PM | CH | ZR | Diff | RS | RS/162 |
| 2005 | AL | Bos | LF | Manny Ramirez | 33 | 149 | 1225 | 237 | 326 | .727 | -13 | -10 | -12 |
| 2006 | AL | Bos | LF | Manny Ramirez | 34 | 123 | 1031 | 172 | 248 | .694 | -18 | -14 | -20 |
| 2007 | AL | Bos | LF | Manny Ramirez | 35 | 120 | 995 | 179 | 251 | .713 | -14 | -11 | -16 |
| 2008 | AL | Bos | LF | Manny Ramirez | 36 | 65 | 528 | 94 | 127 | .740 | -3 | -2 | -7 |
| Total | 457 | 3779 | 682 | 952 | .716 | -48 | -38 | -15 | |||||
| Proj | 102 | 838 | 149 | 208 | .717 | -10 | -8 | -13 |
GP: Games played
Inn: Defensive innings at position
PM: Plays made
CH: Fieldable chances as defined in zone rating
ZR: Zone Rating (PM/CH)
Diff: Plays made by an average defender subtraced from individual plays made
RS: Runs saved compared to average (Diff times run value for a play not made)
RS/162: RS pro-rated to 1440 defensive innings
You'll notice two sets of numbers for Manny here. The first set is his un-adjusted numbers for zone rating. However, there's a flaw with how zone rating is scored in Fenway which makes those numbers useless. Balls off the wall are considered fieldable for some bizarre reason. So what I did last year and what I'm doing this year is trying to figure out the rough impact of that. What I've found is Fenway zone rating is about .150 - .200 lower than everywhere else, so I re-calculate plays made for Boston LF by an average of Fenway's ZR and the league average ZR. On a full-season basis that's about a 15-20 run increase.
Anyhoo. Bay's not a very good defensive player, probably around the level of Hideki Matsui or so. Manny seems to be similar, maybe a few runs worse. So really, defense is a wash as well over one-third of a season.
The moral of the post? Don't
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