White Sox acquire pitcher Dan Jennings from Miami Marlins

The last time I saw Andre Rienzo pitch in person, he gave up a home run to Minnesota outfielder Oswaldo Arcia that landed on the concourse beyond the right-field bleachers at U.S. Cellular Field. That ball had to travel at least 460 feet.

White Sox fans won't have to worry about seeing such horror from Rienzo any longer, as the less-than-mediocre right-hander was traded Thursday to the Miami Marlins in exchange for left-handed relief pitcher Dan Jennings.

The Sox already added Zach Duke to be the main lefty out of their bullpen, but it never hurts to have two left-handers around to pitch in relief. Perhaps Jennings can be that second guy.

Jennings, 27, worked in 47 games last year for the Marlins. He compiled a 1.34 ERA and 1.5337 WHIP. He allowed 45 hits and struck out 38 in 40.1 IP. At one point, Jennings had a stretch of 19 consecutive appearances where he did not allow an earned run.

I don't think I'd count on Jennings to be a high-leverage reliever. He gives up a few too many hits for that. However, he's a guy who can be used in the sixth or the seventh inning. He's also the type who will probably pitch in games where the Sox are trailing, so Duke can be saved to pitch in games where the Sox are leading.

It is important for manager Robin Ventura and pitching coach Don Cooper to understand that Jennings is not a left-handed specialist, so don't use him in that way. In fact, left-handed hitters have hit more than 50 points higher than right-handed hitters against Jennings over the course of his career:

Career vs. left-handed hitters: .289/.354/.403
Career vs. right-handed hitters: .238/.322/.389

The trend of being more successful against righties also can be seen in Jennings' 2014 numbers:

2014 vs. left-handed hitters: .299/.364/.390
2014 vs. right-handed hitters: .265/.326/.398

Modern managers love to use left-handed pitchers against left-handed hitters, but Jennings is one pitcher where Ventura will need to go against the conventional wisdom. He shouldn't bring Jennings in specifically to face a left-handed hitter unless that particular hitter is especially weak against left-handed pitching.

As for Rienzo, well, the 26-year-old will not be missed on the South Side after going 4-5 with a 6.82 ERA in 18 games (11 starts) in 2014. Maybe he will benefit from a change of scenery, but he was not in the Sox' plans.

Opening Day 2014 at U.S. Cellular Field

White Sox left fielder Alejandro De Aza is on pace for 324 home runs and 486 RBIs this season.

OK, so that isn't going to happen, but credit De Aza for coming up with a big performance on Opening Day -- two home runs and three RBIs in the Sox' 5-3 victory over the Minnesota Twins.

It was De Aza's first multihomer game of his career. He became just the fourth Sox player to hit two home runs in a game on Opening Day. The others are Minnie Minoso, Sammy Sosa and Jim Thome.

As you can see from the picture, the weather cooperated on Monday. It was windy day on the South Side, but the temperatures were in the 60s. In fact, it was the warmest day in the Chicago area since last November. After the winter we've had, I had no complaints.

Here are a few other first impressions from yesterday's game:

1. The Sox played errorless defense. I don't know if that's going to last, but it was nice to see. I'll bet the Sox coughed up 15 to 20 games on poor defense alone in 2013. They were sloppy at times during spring training as well, so defense ranks as my No. 1 concern coming into the season. On Monday, all the routine plays were handled behind ace left-hander Chris Sale. If the Sox could just be adequate defensively, they might add five to 10 games to their win total on that alone.

2. Jose Abreu hits the ball hard. Really hard. He crushed the first pitch he saw in the big leagues for a double to right field. Minnesota outfielder Oswaldo Arcia didn't have time to react before the ball was over his head. Abreu went 2-for-4 with an RBI in his first game, and he hit the ball right on the screws three times. We'll see how Abreu reacts as pitchers adjust to him, but it was a good start for the Cuban slugger.

3. I think Adam Eaton is going to become a fan favorite on the South Side. He went 2-for-4 with a run scored in his first game, but perhaps his most impressive at-bat was one in which he made an out. He saw 11 pitches from Minnesota reliever Anthony Swarzak in the seventh inning. He fouled off several good pitches before grounding out to first base. Eaton looks like he's going to be a tough out, and just in general, he seems like he's going to be a pain to opposing teams. Sox fans like guys like that.

4. There are two types of pitchers who start on Opening Day. There are aces, and then there are guys who pitch on Opening Day because somebody has to. Sale is an ace. Minnesota's Ricky Nolasco started because, well, somebody had to start for the Twins. The difference in quality between those two guys is pretty obvious to anyone who watched this game. No surprise that Sale got the win and Nolasco the loss.

5. Sox manager Robin Ventura has selected veteran Matt Lindstrom to be his closer. Lindstrom picked up the save Monday, retiring three of the four batters he faced with one strikeout. I'm probably in the minority on this one, but I like Lindstrom over Nate Jones in the ninth inning. Will Lindstrom be a dominant closer? Hell no. In fact, I wouldn't be surprised if Daniel Webb takes his job before the year is over. But for me, Jones walks too many batters to be a closer. His command was spotty at best during the spring. Lindstrom will get beat at times, but I think he's less likely to give games away with walks than Jones. I'm fine with giving Lindstrom a shot.

161 games to go, but for one day, the Sox and their fans can feel good about this performance. The Sox have won each of their last seven home openers, and Monday's effort was a solid one from top to bottom.