Street (knee) is making his 2017 Cactus League debut Friday, Jeff Fletcher of The Orange County Register reports.
Coming off a 6.45 ERA during (surprise) an injury-shortened 2016, Street is battling for the closer role with Cam Bedrosian (groin) and Andrew Bailey, among others. His body of work and name recognition may land him the job initially, but it's wise for fantasy players to remain skeptical, especially considering his health issues and the talent Bedrosian boasts when healthy.
Smith (forearm) has made four rehab starts at AZL rookie ball and is expected to return to Triple-A Salt Lake in the near future.
The 25-year-old had an outside chance at the Angels Opening Day roster in spring training, but has been dealing with a forearm strain all season and has made only one appearance for Salt Lake.
Sierra was optioned to Triple-A Memphis prior to Friday's game against the Cubs.
Sierra has spent a couple small chunks of time with the Cardinals this year, and gave the club a look into the future with an impressive five-day stint over the past week, going 7-for-20 at the plate with two RBI during his time in the outfield. The 21-year-old is not a power hitter by any means -- all seven hits were singles -- but provides speed and outstanding contact ability. With Randal Grichuk (back) coming off the DL on Friday, Sierra will head back down to Memphis for the time being.
Iannetta went 2-for-5 with a pair of doubles and a run scored in Thursday's 12-2 win over the Reds.
Starting for just the second time in the Diamondbacks' first six games of the second half, Iannetta made an impact right away while batting out of the two hole, advancing leadoff man Daniel Descalso to third base on his first-inning double before Jake Lamb's three-run homer brought both players in. The Diamondbacks were resting several key regulars for the day game, which allowed Iannetta to assume a higher perch in the lineup than he'd normally occupy. Since Iannetta regularly cedes time behind the plate to Jeff Mathis and Chris Herrmann and frequently slots into the bottom third of the order when he does play, it will be difficult to mine much value from him outside of NL-only leagues.
Tuivailala was sent down to Triple-A Memphis on Friday.
Tuivailala had pitched well since being recalled to the big-league team in mid-June, allowing just one run over the course of 10 innings on the mound. His 10:2 K:BB provided promise, but with Randal Grichuk (back) and Zach Duke (elbow) returning from the disabled list, Tuivailala was transferred back to Memphis in order to make room on the 25-man roster. Although the 24-year-old may spend an extended period of time in Memphis, it would come as a surprise if he didn't resurface with the Cardinals in the near future.