Las Vegas oddsmakers have established the Reds as -127 road favorites, while the total is holding steady at its opening number of eight.
Pittsburgh will look to win two games in a row for just the third time this year, picking up a 3-2 win on Saturday that moved its home record to 6-5 on the season. The Pirates' pitching staff came into that affair with a 2.27 home ERA.
Charlie Morton (1-2, 4.22 ERA) looks to bounce back from his worst outing of the year, allowing six runs (five earned) and eight hits over 4.1 innings of work in a 10-7 road loss to the St. Louis Cardinals.
He has served up a home run in each of his last two starts.
The right-hander has been solid in two home starts, posting an even 1-1 mark and 1.50 ERA, as he's allowed three earned runs or less in seven straight starts at PNC Park dating back to last year.
Morton will be facing the Reds for the 11th time in his career, coming in with a 4-4 record and 3.79 ERA, including a 3-0 mark and 0.93 ERA in four outings a year ago. Cincinnati first baseman Joey Votto has just five hits in 21 at-bats (.238) against him.
The Pirates are 1-5 in Morton's last six starts as a home underdog of +110 to +150, while the "under" has cashed in five straight in that situation.
Cincinnati still has an opportunity of winning this series and will look to win its sixth straight Sunday game in the process dating back to last year. The Reds' bullpen has been tremendous this season, coming into yesterday's game leading the NL with a 2.54 ERA.
Mat Latos (1-2, 5.97 ERA) has led the squad to victory in his last two starts, including a 6-5 home win over the Houston Astros in a no-decision effort last time out. He allowed five runs and 10 hits over 6.1 innings in that effort.
The right-hander is 0-1 with an 8.44 ERA in two road outings this year, as opposing hitters are batting .318 against him. Those numbers could improve due to his 2-0 record and 2.77 ERA when facing the Pirates on the road in two career starts.
Latos may also benefit from umpire Jim Wolf being behind the plate. He's allowed just four earned runs over 20 innings of work, with the "under" cashing in all three games.
Weather forecasts suggest sunny skies and game-time temperatures in the mid-70s, with a slight 5-10 mph breeze out of the north (out to right).