Key things to watch for in today's games

Key things to watch for in today's games

An exciting weekend of Major League Baseball concludes on Sunday, as several big series wrap up.

The Blue Jays and Yankees send a couple young hurlers to the mound in their series finale, Mets right-hander Matt Harvey toes the rubber in Pittsburgh, and three other aces take the ball.

Here are five games to watch:

AL East showdown concludes … for now: NYY @ TOR, 1:07 p.m. ET
The race is on in the American League East, as Toronto used an 11-game winning streak -- and an active non-waiver Trade Deadline -- to challenge the struggling Yankees.

The two finish their three-game series Sunday and won't meet again until mid-September.

Rookie right-hander Luis Severino makes his third start after fanning seven over five innings in his debut and turning in a quality start in his second. The Blue Jays counter with righty Drew Hutchison, who threw six innings of one-run ball against the Yankees on Opening Day.

Harvey faces Pirates: PIT @ NYM, 1:10 p.m. ET
Harvey has been impressive for most of the season -- his first since Tommy John surgery -- and appears to be hitting his stride of late. The young righty has worked at least seven innings in six straight starts, including scoreless outings in the last two.

On Sunday, he'll face a Pirates team that roughed him up for seven runs in four innings in May. Pittsburgh -- whose lead for the top National League Wild Card spot is dwindling -- counters with lefty Jeff Locke (6-7, 4.43 ERA).

Harvey's scoreless outing

Greinke welcomes Reds: CIN @ LAD, 4:10 p.m. ET
Dodgers right-hander Zack Greinke -- the best pitcher in baseball this year -- starts in the series finale against the Reds. Greinke rebounded from a rough outing against the Phillies (six runs, five earned) to throw six shutout innings his last time out against the Nationals. He's 5-2 with a 2.75 ERA in 10 career starts against Cincinnati.

The Reds counter with right-hander Anthony DeSclafani, who's been a bright spot in his first full season in the Majors. DeSclafani is looking to toss his fifth straight quality start.

Greinke tosses six scoreless

Sale looks to contain Cubs: CHC @ CWS, 2:10 p.m. ET
The Cubs have been the NL's hottest team lately, but know full well what a pitcher of Chris Sale's caliber can do. The lefty, who starts for the White Sox on Sunday, struck out 10 over seven innings of one-run ball against the Cubs in July.

Sale is back to his usual self after a couple rough starts in which he allowed seven runs, holding the Angels to two runs in 7 1/3 innings his last time out.

Seeking a 10th straight win, the Cubs counter with Trade Deadline acquisition Dan Haren, who earned his first win for his new team his last time out.

This game will also decide whether the annual Crosstown Cup series ends in a tie.

Haren wins Cubs home debut

Bumgarner hosts Nats: WAS @ SF, 4;05 p.m. ET
Left-hander Madison Bumgarner seems to be rounding into postseason form -- and the Giants will need him to be at that level the rest of the way if they look to end their odd-year blues. Bumgarner allowed one run and struck out 12 in a complete game his last time out, against the Astros, and has allowed just one run in four of his last five starts. He was roughed up by the Nationals on Independence Day, allowing six runs in five innings.

The stumbling Nationals send rookie right-hander Joe Ross to the mound as he looks to rebound from his worst career start. He allowed five runs in 4 2/3 innings against the Dodgers in his previous outing.

Bumgarner gets complete-game win

Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.