Nice! Can anyone confirm whether the signature is authentic?

Received this back after two weeks-

Dale Sveum
13483 E Estrella Ave
Scottsdale, AZ 85259-5417
USA

The Red Sox have one- viewtopic.php?f=2&t=1329185

A month after sending it, the same day I posted this.

Within a week of sending it, a day before posting this.

Took a couple of weeks for this-

Chicago Cubs
Wrigley Field
1060 West Addison
Chicago, IL 60613-4397
USA

This one took about a week to get back-

Kansas City Royals
Kauffman Stadium
1 Royal Way
Kansas City, MO 64129-6969
USA

This took a month to get back-

Mike Stanley
1011 N Lake Sybelia Dr
Maitland, FL 32751-4812
USA

Sent this out about two weeks ago, got it back the other day-

Sent card to the below address, received it back signed around a month later-

Troy O'Leary
1060 W Norwood St
Rialto, CA 92377