Patrick Mahomes and the Chiefs picked a terrible time to play arguably their worst first half of football of the season. Kansas City, which needed to come back from 10 points down to beat San Francisco in Super Bowl 54 and again to top Philadelphia in Super Bowl 57, dug itself the familiar early hole in Super Bowl 58.The 49ers played well and controlled both lines of scrimmage to earn the lead, but the Chiefs were most responsible for their three-point effort. After the Niners opened up a 10-0 lead, the Chiefs were fortunate to get a late field goal ahead of receiving the opening kickoff of the second half.The lead could have been bigger for San Francisco had running back Christian McCaffrey in Kansas City territory on the opening drive. Turns out, that was the 49ers' only big mistake compared to plenty of errors by the Chiefs.After the Chiefs punted twice to keep the game scorele s on their first two po se sions. it unraveled quickly. Here's looking back on Kansas City's first-half miscuesSUPER BOWL 58 HQ: | | Chiefs' first-half mistakes in Super Bowl 58Secondary breakdowns vs. backup wide receiversThe 49ers got in position to break the scorele s tie with Brock Purdy hitting consecutive deep balls to little-used targets Chris Conley (a former Chief) and Ray-Ray McCloud (mostly a special teams player). The 49ers cashed in with a by rookie Jake Moody.Isiah Pacheco fumbles Luke Appling Jersey to "answer" McCaffreyThe Chiefs finally hit on a deep ball on their third po se sion, with Mahomes throwing a downfield strike between two defenders, a 52-yard gain for Mecole Hardman. Unfortunately, Pacheco was stripped on a red-zone run, ending the drive quickly with no points.The Chiefs lose their cool the first two timesThe 49ers didn't score after they forced the turnover, but they frustrated the Chiefs with tight end Travis Kelce on the sidelines. It manifested on the field when linebacker Nick Bolton horse-collar tackled Brock Purdy for a 15-yard penalty on the first 49ers play afterward.Mahomes kills the ball and a drive by intentional groundingThe Chiefs' fourth po se sion was dead on arrival after Mahomes threw away the ball to avoid a sack by Chase Young, resulting in an insurmountable 2nd-and-20 from their own 10-yard line. The call was questionable, but it was a crucial mistake all the same.The Chiefs lose their cool a third timeWith 4:58 left in the first half and the 49ers driving at the Chiefs' 37, cornerback L'Jarius Sneed was called for an unnece sary roughne s penalty after a short run by Elijah Mitchell.The Chiefs' defense gets fooled badlyTwo plays after Sneed's ma sive 15-yard violation, Jauan Jennings had plenty of time to throw a swing TD catch and run acro s the field on a wide receiver option pa s. The continued mistakes and lapses caused defensive leader Chris Jones to chew out his teammates, trying to fire up a rally.Did it work? The Chiefs couldn't end the half with a Mahomes TD drive, but it cut the lead to one po se sion with a late field goal with 20 seconds left. Just like that, the Chiefs can take the lead with a TD early in the second half.The 49ers played a great half and have a small lead. Mahomes plays his best when trailing in the Super Bowl, as evidenced by his past previous two rings. The Chiefs flopped in the first half, but history shows they might be right where they want to be. Duke Ellis Jersey