Want to see what a player’s future trade value will be? Or estimate his free agent or extension contract? You can play around with all kinds of scenarios here if you’re a GM-level subscriber.

Click on the tabs for each scenario. Here's a video showing how the future trade value tab works. And for free agents and extension candidates, use the dropdown to see how the contract would vary by changing the number of years.

Front Office-level subscribers and above can also see a history of past and present trade values. We also visually display our calculations, so you can see the surplus-value gap between field value and salary in each scenario (except for prospects, who have only implied surplus value). And there's a special subscriber-only comment section below each player's data, so you can have an exclusive conversation with other subscribers.

To give you an idea how it works, we’ll always show a featured player for free.

George Kirby

Mariners

Player Value Timeline

Future Trade Value

George Kirby: Current Control through 2028, Remaining surplus: $103.9m

Total AFV

Total Surplus

Total Salary

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Stats & Information

AgeLevelP1P2AvailabilityYearsAFVSalarySurplusLowMedianHighFangraphs.com URL
27MajorsSPLow4151.247.3103.983.1103.9124.7

Recent Trades with George Kirby

Athletics GET

Trevor Story

-65.9

George Kirby

86.1

20.20

19.9

-0.30

Mariners GET

Tyler Soderstrom

19.9

Marcelo Mayer

53.8

73.70

74.90

1.20

Red Sox GET

Mitch Haniger

-15.5

Ryan Sloan

4.3

-11.2

-12.10

-0.90

Ms. Dajuba

Athletics GET

Trevor Story

-65.9

George Kirby

86.1

Jojo Ingrassia

0.4

20.60

20.60

0.00

Mariners GET

Tyler Soderstrom

19.9

Marcelo Mayer

53.8

Dalton Rogers

1.2

74.90

74.90

0

Red Sox GET

Mitch Haniger

-15.5

Will Johnston

0.7

Ryan Sloan

4.3

-10.5

-10.5

0

Ms. Dajuba

Astros GET

Grayson Rodriguez

45.2

Colton Cowser

44.8

Ashton Izzi

0.8

Ryan Sloan

4.3

95.1

95.2

0.10

Mariners GET

Yordan Alvarez

95.2

95.2

95.20

-0.00

Orioles GET

George Kirby

86.1

Gabe Speier

4

90.1

90

-0.10

Ms. Dajuba

Mariners GET

Alec Bohm

24.9

Ranger Suarez

20.1

Bryson Stott

24.8

Total Value

69.80

Phillies GET

Mitch Haniger

-15.5

George Kirby

86.1

Total Value

70.6

futureTraderJerry1

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