Each season the John Cahill Medal is award to the player judged to be Port Adelaide's best and fairest in the AFL. 

How votes are calculated: Following the completion of each game, a three-person panel, made up of Senior Coach Ken Hinkley, each player’s respective line coach and GM – Football Chris Davies cast their votes. Each player’s performance is rated between zero and five, with a maximum of 15 and minimum of zero votes awarded per player, per game.  

Round 1 v Collingwood 
5. Rozee 4. Boak, Sweet 3. Bergman, Drew 2. Lukosius, Richards, Sinn, Wines 1. Aliir, Berry, Burton, Farrell, Jones, Mead 

Round 2 v Richmond 
11. Rozee 9. Jones, Richards 8. Georgiades, Powell-Pepper 7. Burgoyne 6. Aliir, Byrne-Jones, Mead, Rioli, Wines 4. Evans, Farrell 3. Bergman, Berry, Moraes, Sinn, Sweet 2. Boak, Burton, Drew, Horne-Francis 

Round 3 v Essendon 
10. Burgoyne 6. Bergman 5. Byrne-Jones, Moraes 4. Georgiades 3. Sinn, Wines 2. Aliir, Ratugolea, Richards 1. Berry, Farrell, Horne-Francis, Mead 

Round 4 v St Kilda 
9. Horne-Francis 8. Georgiades 6. Aliir, Butters, Lord 5. Bergman 3. Jones, Ratugolea, Richards, Sweet 2. Farrell, Powell-Pepper 1. Burgoyne, Drew, Mead 

Round 5 v Hawthorn 
11. Butters, Butters 8. Aliir, Georgiades, Horne-Francis, Powell-Pepper, Richards 5. Drew, Jones, Lord, Mead, Rioli 4. Farrell, Ratugolea, Sinn 3. Burgoyne, Cochrane, Sweet, Wines 1. Bergman, Boak 

Round 6 v Sydney 
10. Butters 9. Rozee 7. Georgiades 6. Farrell, Jones, Rioli 5. Byrne-Jones, Drew, Ratugolea 3. Aliir, Mead, Powell-Pepper 2. Burgoyne, Sinn 1. Atkins, Cochrane, Horne-Francis, Moraes, Sweet 

Round 7 v North Melbourne 
9. Butters, Rozee 6. Lord 5. Byrne-Jones, Georgiades, Horne-Francis, Powell-Pepper, Ratugolea 3. Farrell, Richards, Wines 2. Aliir, Jones 1. Rioli 

Round 8 v Western Bulldogs 
4. Butters, Rozee 3. Bergman 2. Burgoyne, Rioli 1. Byrne-Jones, Georgiades, Horne-Francis, Lorenz 

Round 9 v Adelaide 
11. Rozee 10. Bergman, Butters 5. Finlayson, Horne-Francis, Ratugolea, Wines 6. Byne-Jones 4. Aliir, Burton, Georgiades 3. Burgoyne, Drew, Powell-Pepper, Richards, Sinn, Visentini 1. Mead 

Round 10 v Geelong 
6. Jones, Rozee 4. Powell-Pepper, Ratugolea 3. Aliir, Byrne-Jones, Wines 2. Bergman, Burgoyne, Burton, Richards, Rioli, Visentini 1. Butters, Drew, Evans, Georgiades 

Round 11 v Fremantle 
6. Bergman 4. Drew, Georgiades, Wines, Zerk-Thatcher 3. Butters, Byrne-Jones, Rozee 2. Burton, Richards 1. Aliir, Burgoyne, Evans, Finlayson, Rioli, Visentini  

Round 12 – BYE 

Leaderboard after Round 12 
1. Rozee – 78 
2. Butters – 64 
3. Georgiades – 51 
4. Bergman – 46 
5. Aliir – 39  
6. Richards – 37  
=7. Byrne-Jones – 35 
=7. Ratugolea 35 
9. Burgoyne – 34  
=10 Horne-Francis – 32  
=10 Jones – 32  

Round 13 v GWS 
10. Butters 9. Rozee 7. Bergman, Ratugolea 5. Rioli, Zerk-Thatcher 4. Drew 3. Aliir, Burgoyne, Farrell, Richards, Sinn, Visentini 2. Burton, Jackson, Wines 1. Byrne-Jones, Georgiades, Mead 

Round 14 v Melbourne 
13. Georgiades 11. Ratugolea 9. Horne-Francis 8. Rozee 6. Bergman, Butters, Byrne-Jones 5. Powell-Pepper, Richards 3. Burgoyne, Drew, Rioli, Sinn, Wines, Zerk-Thatcher 2. Aliir, Farrell, Liddy, Sweet, Visentini 

Round 15 v Sydney 
5. Butters 3. Jones, Richards, Rozee, Sinn 2. Horne-Francis, Liddy, Powell-Pepper, Ratugolea, Rioli, 1. Burgoyne, Byrne-Jones, Drew, Zerk-Thatcher 

Round 16 v Carlton 
10. Georgiades 9. Bergman, Richards, Rozee 8. Butters, Ratugolea 7. Byrne-Jones 4. Jackson, Powell-Pepper, Visentini 3. Aliir, Boak, Burgoyne, Jones, Rioli, Sinn, Zerk-Thatcher 2. Drew, Farrell, Liddy, Sweet 1. Horne-Francis 

Round 17 v Brisbane 
9. Georgiades, Lukosius 8. Butters 7. Powell-Pepper 6. Rozee 5. Boak 4. Aliir, Bergman, Sinn, Zerk-Thatcher 3. Horne-Francis, Jones, Richards, Rioli, Sweet, Wines 2. Farrell 1. Burgoyne, Byrne-Jones, Jackson, Ratugolea 

Round 18 v West Coast 
9. Butters, Georgiades, Horne-Francis, Richards 5. Aliir, Byrne-Jones, Wines 4. Jones 3. Burgoyne, Farrell, Jackson, Liddy, Sinn 2. Bergman, Boak, Rozee, Sweet, Zerk-Thatcher 1. Drew, Lord, Lukosius, Rioli 

Round 19 v Hawthorn 
9. Sweet 6. Drew 5. Farrell, Sinn 4. Butters 3. Georgiades, Jones, Richards, Wines 2. Burgoyne, Lukosius 1. Byrne-Jones 

Round 20 v Adelaide 
7. Butters 5. Sinn 4. Georgiades 3. Aliir, Drew, Farrell, McEntee, Richards, Sweet, Wines, Zerk-Thatcher 1. Rozee 

Round 21 v Geelong 
8. Wines 6. Georgiades 5. McEntee 4. Sweet 3. Berry, Jones, Liddy, Richards, Sinn 2. Farrell 1. Boak, Burgoyne, Drew, Mead 

Round 22 v Fremantle 
11. Aliir 9. Butters 6. Boak 5. Farrell, McEntee 4. Berry, Georgiades, Sweet 3. Byrne-Jones, Liddy, Lorenz, Lukosius, Richards, Zerk-Thatcher 2. Lord, Mead 1. Drew, Rioli, Sinn, Whitlock 

Round 23 v Carlton 
4. Butters, Jones, Moraes, Whitlock 3. Berry, Boak, Richards, Sweet 1. Byrne-Jones, Farrell, Sinn, Zerk-Thatcher 

Round 24 v Gold Coast 
10. Butters, Rozee 9. Georgiades 6. Aliir 5. Boak, Drew 4. Byrne-Jones, Liddy, Sweet, Zerk-Thatcher 3. Berry, Farrell, Jones, Mackinlay, Ramm, Richards 2. McEntee, Moraes, Whitlock 1. Lord, Rioli 

Final leaderboard 
1. Butters – 134 
2. Georgiades – 118 
3. Rozee – 117 
4. Richards – 84 
5. Aliir – 73 
6. Bergman 67  
7. Byrne-Jones – 64 
8. Jones – 58  
9. Ratugolea – 57  
=10 Horne-Francis – 56 
=10 Wines – 56