Carlos Sierra signed with the Astros on Thursday, the Houston Chronicle's Evan Drellich reports.

Sierra signed with the Astros on Thursday, the Houston Chronicle's Evan Drellich reports.

Analysis:

The Cuban righty is 21, has a four-pitch mix, and is known as a strike thrower. This is not a major international signing, as Sierra is not major league ready and does not carry a high ceiling. Look for him to begin the year in the lower levels of the Astros' minor league system.