Astros' Jose Altuve writes letter to his future self

Astros second baseman Jose Altuve hit .338 and a career-high 24 home runs in 2016 en route to a second batting title.﻿ Astros second baseman Jose Altuve hit .338 and a career-high 24 home runs in 2016 en route to a second batting title.﻿ Photo: Karen Warren, Staff Photo: Karen Warren, Staff Image 1 of / 8 Caption Close Astros' Jose Altuve writes letter to his future self 1 / 8 Back to Gallery

Jose Altuve wrote a letter to his future self as part of a New Balance ad campaign.

Altuve, who signed with New Balance last year, joined the company's athletes across all sports in a campaign that highlights how the goals and values of athletes drive their decisions and guide their journey through letters written to their future selves that will be published on The Players' Tribune.

New Balance is posting some of the letters on their site.

Letter to #MyFutureSelf. Set an example for future generations.What would you tell your future self? @NB_Baseball pic.twitter.com/NUgiJi4thc — Jose Altuve (@JoseAltuve27) January 17, 2017

"Don't be the best player based on height, be the best player based on your performance," Altuve wrote.

The 5-foot-6 star also added, "Size is not an obstacle."

New Balance also is encouraging customers to write letters to their future selves on the company's web site. In a year, New Balance will email the letter back "so you can see how your experiences shaped your journey."