Wieters will catch 4-5 innings in extended spring on Monday.
"I think the next step for Matt is to be able to continue on and each day feel the same way and each day make sure he feels like he's 100 percent ready to go. He's getting past a lot of the mental blocks," said Russell, who watches Wieters on tape. "Will it be three weeks, will it be four weeks? It's up to Matt and how he continues to progress and if we don't have any setbacks. And knock on wood, so far so good."
Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Facebook and Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.