Oakland A's spring training: Pictures of Jim Harbaugh coaching first base

Spring training is a time to have fun. There's work to be done, but everything is a bit more laid-back and random faces show up now and then. On Saturday, the Oakland A's got a visit from Jim Harbaugh, former head coach of Stanford football and the 49ers and current skipper of the Michigan Wolverines. As Jane Lee notes on MLB.com, Harbaugh and A's manager Bob Melvin were once teammates on an American Legion team in the Bay Area; read her post for more on the relationship between the two coaches.

Harbaugh looked pretty good in an A's uniform, and it's worth noting that he rocked the high socks and stirrups. Respect.

Pics or it didn't happen!

Jim Harbaugh specifically requested the high socks. And his old No. 4. pic.twitter.com/1fkpTa41EU

— Jane Lee (@JaneMLB) March 7, 2015

You bet Harbaugh will be an aggressive first-base coach. His style: "Let's go for two!" pic.twitter.com/yiC8m0xP0w

— Jane Lee (@JaneMLB) March 7, 2015

Harbaugh playing catch pic.twitter.com/Wgy8LKw59r

— Jane Lee (@JaneMLB) March 7, 2015

ICYMI: @CoachJim4UM, sporting the number 4, is helping coach today's #Athletics game. #GreenCollar pic.twitter.com/sSDn5VZOYW

— Oakland Athletics (@Athletics) March 7, 2015

He certainly looked the part. Coaches gonna coach.

.@CoachJim4UM, where’s the Sharpie? http://t.co/uOPv0JbvsI #GreenCollar pic.twitter.com/1vN7rG0g8v

— Oakland Athletics (@Athletics) March 7, 2015

Jim Harbaugh, your new #athletics first base coach. pic.twitter.com/GF0pywS8zl

— John Shea (@JohnSheaHey) March 7, 2015

Harbaugh waving Billy Burns towards 2nd on a ball down the line: completely unnecessary, but totally awesome. #Athletics

— Donny Baarns (@DonnyBaarns) March 7, 2015

Harbs being important. pic.twitter.com/hBR1Tqrwbp

— newballpark (@newballpark) March 7, 2015

First-base coach Jim Harbaugh still out there for the #Athletics in the sixth inning, outside the box like a boss pic.twitter.com/id0mFt0ypE

— Christina Kahrl (@ChristinaKahrl) March 7, 2015

Celebrating after #athletics comeback win over #angels: pic.twitter.com/NY3NkrQLaa

— John Shea (@JohnSheaHey) March 7, 2015

And of course, he made time for some fans as well.

Harbaugh has been signing for several minutes pic.twitter.com/FcXMqbUBfe

— Jane Lee (@JaneMLB) March 7, 2015

Never know who might show up each day. Today @CoachJim4UM was coaching 1st base and supporting the #green&gold pic.twitter.com/p9h3LQ647i

— Kendall Graveman (@kage49) March 7, 2015

Baseball is superstitious.

A's get the walk-off win. Jim Harbaugh is never leaving.

— Jane Lee (@JaneMLB) March 7, 2015

Whatever Michigan is paying you, Jim, we'll give you double (in store credit). Whaddya say to that?

A job well done! -- Photo credit: Joe Camporeale-USA TODAY Sports