Sorry, but it doesn't work like that unfortunately. Xbox1 saves are already compatible with the Xbox 360, technically. However, on a 360, you can't copy or move Xbox1 saves from one memory device to another (can't transfer them like 360 saves). Xbox1 saves are stored in one separate section on the HDD, and the only way to transfer saves to that section of the HDD is to use a transfer cable w/ xport or xplorer to put them there.
Therefore, your ONLY, I repeat,
ONLY!!! option to get saves for 2K5 would be to buy a transfer cable.
ESPN NFL 2K5 - $0.99
Microsoft Transfer Cable - $19.99
TOTAL = $20.98 plus tax
Beats paying $59.99 plus tax for Madden 11 (Potentially another letdown)