Introducing ... The ERV Boxscore!

After dozens of man-hours, the crack R&D team here at Nats Blog are finally able to unveil their latest innovation to the devoted Nats Blog readers -- the ERV Boxscore! Below is the first sample, from today's game.

An initial note: all values are stated from the perspective of the team, so that positive is always good and negative is always bad. For example, a pitcher with a positive RV has done well, while one with a negative RV has done not so well.
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Game Number: 19 , April 24, 2005
Final Score:
Washington 11
New York 4

Win: Wilkerson, Vidro & Castilla
Loss: Zambrano, Matthews & Diaz

Washington

Batter	Pos	PA	Bat	Field	Run	Total RV
WilkersonB	CF	6	3.26	0.00	0.16	3.42
JohnsonN	1B	6	0.81	(0.64)	0.16	0.33
VidroJ	2B	5	2.53	0.00	0.00	2.53
GuillenJ	RF	5	0.67	0.00	0.00	0.67
SledgeT	LF	5	(1.47)	0.00	0.00	(1.47)
CastillaV	3B	5	1.79	0.00	0.25	2.04
BennettG	C	5	0.80	0.00	0.00	0.80
GuzmanC	SS	5	(1.01)	0.00	0.00	(1.01)
HernandezL	P	4	(0.58)	0.00	0.00	(0.58)
DavisJ	LF	1	(0.38)	0.00	0.00	(0.38)
CarrollJ	2B	1	(0.52)	0.00	0.00	(0.52)
Totals		48	5.91	(0.64)	0.57	5.85

Pitcher	BFP	RV
HernandezL	31	1.40
EischenJ	2	(0.01)
MajewskiG	8	0.09
Totals	41	1.48

New York

Batter	Pos	PA	Bat	Field	Run	Total RV
ReyesJ	SS	5	(0.44)	0.00	0.00	(0.44)
MatsuiK	2B	5	0.01	0.00	0.00	0.01
BeltranC	CF	5	(0.33)	0.00	0.00	(0.33)
PiazzaM	C	5	0.71	1.06	0.00	1.77
FloydC	LF	5	(0.18)	0.00	0.00	(0.18)
MientkiewiczD	1B	4	(0.71)	0.00	0.00	(0.71)
WrightD	3B	3	0.51	(1.30)	0.00	(0.80)
DiazV	RF	4	(1.11)	0.00	0.00	(1.11)
ZambranoV	P	2	0.03	0.00	0.00	0.03
WoodwardC	3B	2	(0.41)	0.00	0.00	(0.41)
CairoM	PH	1	0.42	0.00	0.00	0.42
Totals		41	(1.48)	(0.25)	0.00	(1.73)

Pitcher	BFP	RV
ZambranoV	29	(3.66)
AybarM	7	(0.33)
MatthewsM	6	(2.80)
KooD	1	0.34
DeJeanM	5	0.54
Totals	48	(5.91)

Judgment calls: Top first, Piazza given fielding credit for tagging out Wilkerson at home.