Cubs agree to contract with lefty Steven Brault, continue fortifying pitching depth

Former Pittsburgh Pirate Steven Brault has agreed to a contract with the Cubs.The Cubs continued to add much-needed depth to their pitching staff Wednesday. They’ve agreed to a major-league deal with lefty Steven Brault, a Sun-Times source confirmed.

Brault, 29, has spent his whole big-league career with the Pirates, amassing a 4.77 ERA. Before adding Brault, the Cubs carried just four left-handed pitchers on their 40-man roster. Brault has one option year remaining.

The Cubs were already short on pitching depth before learning that right-hander Adbert Alzoaly (lat strain) would start the season on the injured list. Brault, who has started about half the games he’s played in his career, could…