With the calendar now officially flipped to September, here are three things we’ll be keeping an eye on around the baseball world throughout the weekend:

1. September Call-Ups:

Today is September 1, which means that active rosters have expanded to 28 for the remainder of the regular season. That leaves each team to add two additional players to their active roster: one pitcher and one position player in most cases. Some teams, including the Tigers and Cubs have already indicated which players they’ll be adding to the roster, while others are waiting for today to make the announcement. Between the additional roster spots available and the fact that players who debut this time of year retain rookie eligibility headed into the following season, organizations often use this time of year to promote prospects and get their feet wet at the big league level. The Yankees are taking that route with both outfield prospect Jasson Dominguez and catcher Austin Wells, for example. Of course, other teams use the opportunity to add veteran players who were in the organization on a minor league deal such as the Dodgers who are expected to select second baseman Kolten Wong to the roster.

2. Angels roster reconstruction:

September call-up season for the Angels arrives on the heels of Lucas Giolito, Reynaldo Lopez, Matt Moore, Dominic Leone and Hunter Renfroe all departing the organization after being claimed on waivers yesterday. That left the club with a whopping seven spots to fill on the active roster last night. Two of those spots have already been filled by the recall of right-hander Jose Marte and the contract selection of outfielder Kyren Paris, meaning the club still has five open slots on the active roster that must be filled before tonight’s game against the A’s, which will begin at 8:40pm CT. The club’s 40-man roster stands at 36, giving Anaheim’s front office plenty of flexibility as they look to make the necessary additions.

3. Suarez to return:

When Phillies left-hander Ranger Suarez hit the injured list in August with a hamstring strain, he told reporters that the strain was mild and he hoped to return not long after the 15-day minimum. It seems he wasn’t far off in that estimation, as Suarez is expected to return to big league action on Sunday against the Brewers in Milwaukee. As noted by Todd Zolecki of MLB.com, Suarez will pitch a final bullpen session today before plans for him to return this weekend are set in stone.

The 27-year-old southpaw’s return should be a noticeable boost for the Phillies as they look to secure the first NL Wild Card spot this September. In 17 starts this season, Suarez has posted a 3.88 ERA with an identical 3.88 FIP in 97 1/3 innings of work. That quality mid-rotation performance has helped the Phillies remain competitive despite a down year from right-hander Aaron Nola, who finished fourth in NL Cy Young award voting last year but has posted a lackluster 4.30 ERA in 27 starts this season.

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